diff --git a/src/mworker-prog.c b/src/mworker-prog.c
index 467ce9b..ba52406 100644
--- a/src/mworker-prog.c
+++ b/src/mworker-prog.c
@@ -230,22 +230,24 @@
 	return err_code;
 
 error:
-	LIST_DEL(&ext_child->list);
-	if (ext_child->command) {
-		int i;
+	if (ext_child) {
+		LIST_DEL(&ext_child->list);
+		if (ext_child->command) {
+			int i;
 
-		for (i = 0; ext_child->command[i]; i++) {
-			if (ext_child->command[i]) {
-				free(ext_child->command[i]);
-				ext_child->command[i] = NULL;
+			for (i = 0; ext_child->command[i]; i++) {
+				if (ext_child->command[i]) {
+					free(ext_child->command[i]);
+					ext_child->command[i] = NULL;
+				}
 			}
+			free(ext_child->command);
+			ext_child->command = NULL;
+		}
+		if (ext_child->id) {
+			free(ext_child->id);
+			ext_child->id = NULL;
 		}
-		free(ext_child->command);
-		ext_child->command = NULL;
-	}
-	if (ext_child->id) {
-		free(ext_child->id);
-		ext_child->id = NULL;
 	}
 
 	free(ext_child);