diff --git a/include/types/compression.h b/include/types/compression.h
index dfff2f9..6f418fa 100644
--- a/include/types/compression.h
+++ b/include/types/compression.h
@@ -23,8 +23,12 @@
 #ifndef _TYPES_COMP_H
 #define _TYPES_COMP_H
 
+#ifdef USE_ZLIB
+
 #include <zlib.h>
 
+#endif /* USE_ZLIB */
+
 struct comp {
 	struct comp_algo *algos;
 	struct comp_type *types;
@@ -32,7 +36,9 @@
 };
 
 struct comp_ctx {
+#ifdef USE_ZLIB
 	z_stream strm; /* zlib stream */
+#endif /* USE_ZLIB */
 };
 
 struct comp_algo {
diff --git a/include/types/session.h b/include/types/session.h
index 5546be8..ae11f81 100644
--- a/include/types/session.h
+++ b/include/types/session.h
@@ -33,6 +33,7 @@
 
 #include <types/channel.h>
 #include <types/compression.h>
+
 #include <types/proto_http.h>
 #include <types/proxy.h>
 #include <types/queue.h>