diff --git a/include/proto/acl.h b/include/proto/acl.h
index 6b94296..dd6dae5 100644
--- a/include/proto/acl.h
+++ b/include/proto/acl.h
@@ -90,7 +90,8 @@
  * HTTP initialization requirements in the proxy. If <err> is not NULL, it will
  * be set to an error message upon errors, that the caller will have to free.
  */
-struct acl_cond *build_acl_cond(const char *file, int line, struct proxy *px, const char **args, char **err);
+struct acl_cond *build_acl_cond(const char *file, int line, struct list *known_acl,
+				struct proxy *px, const char **args, char **err);
 
 /* Execute condition <cond> and return either ACL_TEST_FAIL, ACL_TEST_MISS or
  * ACL_TEST_PASS depending on the test results. ACL_TEST_MISS may only be
diff --git a/src/acl.c b/src/acl.c
index 8417c1b..bc1f2e2 100644
--- a/src/acl.c
+++ b/src/acl.c
@@ -1054,7 +1054,8 @@
  * caller is responsible for freeing. The initial location must either be
  * freeable or NULL.
  */
-struct acl_cond *build_acl_cond(const char *file, int line, struct proxy *px, const char **args, char **err)
+struct acl_cond *build_acl_cond(const char *file, int line, struct list *known_acl,
+				struct proxy *px, const char **args, char **err)
 {
 	enum acl_cond_pol pol = ACL_COND_NONE;
 	struct acl_cond *cond = NULL;
@@ -1075,7 +1076,7 @@
 		return NULL;
 	}
 
-	cond = parse_acl_cond(args, &px->acl, pol, err, &px->conf.args, file, line);
+	cond = parse_acl_cond(args, known_acl, pol, err, &px->conf.args, file, line);
 	if (!cond) {
 		/* note that parse_acl_cond must have filled <err> here */
 		return NULL;
diff --git a/src/cfgparse.c b/src/cfgparse.c
index 1f56b6e..e7bca18 100644
--- a/src/cfgparse.c
+++ b/src/cfgparse.c
@@ -1822,7 +1822,7 @@
 
 	if (cond_start &&
 	    (strcmp(*cond_start, "if") == 0 || strcmp(*cond_start, "unless") == 0)) {
-		if ((cond = build_acl_cond(file, line, px, cond_start, &errmsg)) == NULL) {
+		if ((cond = build_acl_cond(file, line, &px->acl, px, cond_start, &errmsg)) == NULL) {
 			Alert("parsing [%s:%d] : error detected while parsing a '%s' condition : %s.\n",
 			      file, line, cmd, errmsg);
 			ret_code |= ERR_ALERT | ERR_FATAL;
@@ -3841,7 +3841,7 @@
 		}
 
 		if (strcmp(args[2], "if") == 0 || strcmp(args[2], "unless") == 0) {
-			if ((cond = build_acl_cond(file, linenum, curproxy, (const char **)args + 2, &errmsg)) == NULL) {
+			if ((cond = build_acl_cond(file, linenum, &curproxy->acl, curproxy, (const char **)args + 2, &errmsg)) == NULL) {
 				Alert("parsing [%s:%d] : error detected while parsing switching rule : %s.\n",
 				      file, linenum, errmsg);
 				err_code |= ERR_ALERT | ERR_FATAL;
@@ -3898,7 +3898,7 @@
 			goto out;
 		}
 
-		if ((cond = build_acl_cond(file, linenum, curproxy, (const char **)args + 2, &errmsg)) == NULL) {
+		if ((cond = build_acl_cond(file, linenum, &curproxy->acl, curproxy, (const char **)args + 2, &errmsg)) == NULL) {
 			Alert("parsing [%s:%d] : error detected while parsing switching rule : %s.\n",
 			      file, linenum, errmsg);
 			err_code |= ERR_ALERT | ERR_FATAL;
@@ -3934,7 +3934,7 @@
 			goto out;
 		}
 
-		if ((cond = build_acl_cond(file, linenum, curproxy, (const char **)args + 1, &errmsg)) == NULL) {
+		if ((cond = build_acl_cond(file, linenum, &curproxy->acl, curproxy, (const char **)args + 1, &errmsg)) == NULL) {
 			Alert("parsing [%s:%d] : error detected while parsing a '%s' rule : %s.\n",
 			      file, linenum, args[0], errmsg);
 			err_code |= ERR_ALERT | ERR_FATAL;
@@ -4209,7 +4209,7 @@
 		}
 
 		if (strcmp(args[myidx], "if") == 0 || strcmp(args[myidx], "unless") == 0) {
-			if ((cond = build_acl_cond(file, linenum, curproxy, (const char **)args + myidx, &errmsg)) == NULL) {
+			if ((cond = build_acl_cond(file, linenum, &curproxy->acl, curproxy, (const char **)args + myidx, &errmsg)) == NULL) {
 				Alert("parsing [%s:%d] : '%s': error detected while parsing sticking condition : %s.\n",
 				      file, linenum, args[0], errmsg);
 				err_code |= ERR_ALERT | ERR_FATAL;
@@ -4267,7 +4267,7 @@
 				err_code |= ERR_ALERT | ERR_FATAL;
 				goto out;
 			}
-			if ((cond = build_acl_cond(file, linenum, curproxy, (const char **)args + 2, &errmsg)) == NULL) {
+			if ((cond = build_acl_cond(file, linenum, &curproxy->acl, curproxy, (const char **)args + 2, &errmsg)) == NULL) {
 				Alert("parsing [%s:%d] : error detected while parsing a '%s %s' rule : %s.\n",
 				      file, linenum, args[0], args[1], errmsg);
 				err_code |= ERR_ALERT | ERR_FATAL;
@@ -5682,7 +5682,7 @@
 				goto out;
 			}
 
-			if ((cond = build_acl_cond(file, linenum, curproxy, (const char **)args + 2, &errmsg)) == NULL) {
+			if ((cond = build_acl_cond(file, linenum, &curproxy->acl, curproxy, (const char **)args + 2, &errmsg)) == NULL) {
 				Alert("parsing [%s:%d] : error detected while parsing a '%s %s' condition : %s.\n",
 				      file, linenum, args[0], args[1], errmsg);
 				err_code |= ERR_ALERT | ERR_FATAL;
@@ -6431,7 +6431,7 @@
 		}
 
 		if ((strcmp(args[2], "if") == 0 || strcmp(args[2], "unless") == 0)) {
-			if ((cond = build_acl_cond(file, linenum, curproxy, (const char **)args+2, &errmsg)) == NULL) {
+			if ((cond = build_acl_cond(file, linenum, &curproxy->acl, curproxy, (const char **)args+2, &errmsg)) == NULL) {
 				Alert("parsing [%s:%d] : error detected while parsing a '%s' condition : %s.\n",
 				      file, linenum, args[0], errmsg);
 				err_code |= ERR_ALERT | ERR_FATAL;
@@ -6528,7 +6528,7 @@
 		}
 	
 		if ((strcmp(args[2], "if") == 0 || strcmp(args[2], "unless") == 0)) {
-			if ((cond = build_acl_cond(file, linenum, curproxy, (const char **)args+2, &errmsg)) == NULL) {
+			if ((cond = build_acl_cond(file, linenum, &curproxy->acl, curproxy, (const char **)args+2, &errmsg)) == NULL) {
 				Alert("parsing [%s:%d] : error detected while parsing a '%s' condition : %s.\n",
 				      file, linenum, args[0], errmsg);
 				err_code |= ERR_ALERT | ERR_FATAL;
diff --git a/src/proto_http.c b/src/proto_http.c
index 7651461..efbbc84 100644
--- a/src/proto_http.c
+++ b/src/proto_http.c
@@ -8592,7 +8592,7 @@
 		struct acl_cond *cond;
 		char *errmsg = NULL;
 
-		if ((cond = build_acl_cond(file, linenum, proxy, args+cur_arg, &errmsg)) == NULL) {
+		if ((cond = build_acl_cond(file, linenum, &proxy->acl, proxy, args+cur_arg, &errmsg)) == NULL) {
 			Alert("parsing [%s:%d] : error detected while parsing an 'http-request %s' condition : %s.\n",
 			      file, linenum, args[0], errmsg);
 			free(errmsg);
@@ -9036,7 +9036,7 @@
 		struct acl_cond *cond;
 		char *errmsg = NULL;
 
-		if ((cond = build_acl_cond(file, linenum, proxy, args+cur_arg, &errmsg)) == NULL) {
+		if ((cond = build_acl_cond(file, linenum, &proxy->acl, proxy, args+cur_arg, &errmsg)) == NULL) {
 			Alert("parsing [%s:%d] : error detected while parsing an 'http-response %s' condition : %s.\n",
 			      file, linenum, args[0], errmsg);
 			free(errmsg);
@@ -9137,7 +9137,7 @@
 		}
 		else if (strcmp(args[cur_arg], "if") == 0 ||
 			 strcmp(args[cur_arg], "unless") == 0) {
-			cond = build_acl_cond(file, linenum, curproxy, (const char **)args + cur_arg, errmsg);
+			cond = build_acl_cond(file, linenum, &proxy->acl, curproxy, (const char **)args + cur_arg, errmsg);
 			if (!cond) {
 				memprintf(errmsg, "error in condition: %s", *errmsg);
 				return NULL;
diff --git a/src/tcp_rules.c b/src/tcp_rules.c
index f259d51..bdf97c8 100644
--- a/src/tcp_rules.c
+++ b/src/tcp_rules.c
@@ -606,7 +606,7 @@
 	}
 
 	if (strcmp(args[arg], "if") == 0 || strcmp(args[arg], "unless") == 0) {
-		if ((rule->cond = build_acl_cond(file, line, curpx, (const char **)args+arg, err)) == NULL) {
+		if ((rule->cond = build_acl_cond(file, line, &curpx->acl, curpx, (const char **)args+arg, err)) == NULL) {
 			memprintf(err,
 			          "'%s %s %s' : error detected in %s '%s' while parsing '%s' condition : %s",
 			          args[0], args[1], args[2], proxy_type_str(curpx), curpx->id, args[arg], *err);
@@ -850,7 +850,7 @@
 	}
 
 	if (strcmp(args[arg], "if") == 0 || strcmp(args[arg], "unless") == 0) {
-		if ((rule->cond = build_acl_cond(file, line, curpx, (const char **)args+arg, err)) == NULL) {
+		if ((rule->cond = build_acl_cond(file, line, &curpx->acl, curpx, (const char **)args+arg, err)) == NULL) {
 			memprintf(err,
 			          "'%s %s %s' : error detected in %s '%s' while parsing '%s' condition : %s",
 			          args[0], args[1], args[2], proxy_type_str(curpx), curpx->id, args[arg], *err);