diff --git a/include/types/pattern.h b/include/types/pattern.h
index 9b4e340..da383ba 100644
--- a/include/types/pattern.h
+++ b/include/types/pattern.h
@@ -70,7 +70,7 @@
 union pattern_data {
 	struct in_addr ip;        /* used for ipv4 type */
 	struct in6_addr ipv6;     /* used for ipv6 type */
-	uint32_t integer;         /* used for unsigned 32bits integer type */
+	int integer;              /* used for unsigned 32bits integer type */
 	struct chunk str;         /* used for char string type or buffers*/
 };