diff --git a/src/detect-parse.c b/src/detect-parse.c
index c4915abd02..ea48673c47 100644
--- a/src/detect-parse.c
+++ b/src/detect-parse.c
@@ -1127,7 +1127,7 @@ error:
  *  \param -1 parse error
  *  \param 0 ok
  */
-int SigParse(DetectEngineCtx *de_ctx, Signature *s, const char *sigstr, uint8_t addrs_direction)
+static int SigParse(DetectEngineCtx *de_ctx, Signature *s, const char *sigstr, uint8_t addrs_direction)
 {
     SCEnter();
 
diff --git a/src/detect-parse.h b/src/detect-parse.h
index 721f1957f2..58d2d649d8 100644
--- a/src/detect-parse.h
+++ b/src/detect-parse.h
@@ -40,7 +40,6 @@ enum {
 };
 
 /* prototypes */
-int SigParse(DetectEngineCtx *, Signature *, const char *, uint8_t);
 Signature *SigAlloc(void);
 void SigFree(Signature *s);
 Signature *SigInit(DetectEngineCtx *, const char *sigstr);