diff --git a/src/detect-engine-frame.c b/src/detect-engine-frame.c
index 1046aede45..33d78ced7a 100644
--- a/src/detect-engine-frame.c
+++ b/src/detect-engine-frame.c
@@ -40,6 +40,10 @@
 #include "util-validate.h"
 #include "util-print.h"
 
+static InspectionBuffer *DetectFrame2InspectBuffer(DetectEngineThreadCtx *det_ctx,
+        const DetectEngineTransforms *transforms, Packet *p, const Frames *frames,
+        const Frame *frame, const int list_id, const uint32_t idx, const bool first);
+
 void DetectRunPrefilterFrame(DetectEngineThreadCtx *det_ctx, const SigGroupHead *sgh, Packet *p,
         const Frames *frames, const Frame *frame, const AppProto alproto, const uint32_t idx)
 {
@@ -300,7 +304,7 @@ static int FrameStreamDataFunc(
     return 1; // for now only the first chunk
 }
 
-InspectionBuffer *DetectFrame2InspectBuffer(DetectEngineThreadCtx *det_ctx,
+static InspectionBuffer *DetectFrame2InspectBuffer(DetectEngineThreadCtx *det_ctx,
         const DetectEngineTransforms *transforms, Packet *p, const Frames *frames,
         const Frame *frame, const int list_id, const uint32_t idx, const bool first)
 {
diff --git a/src/detect-engine-frame.h b/src/detect-engine-frame.h
index 82dc144ff2..9fe2385b15 100644
--- a/src/detect-engine-frame.h
+++ b/src/detect-engine-frame.h
@@ -31,9 +31,6 @@ int DetectRunFrameInspectRule(ThreadVars *tv, DetectEngineThreadCtx *det_ctx, co
 
 int PrefilterGenericMpmFrameRegister(DetectEngineCtx *de_ctx, SigGroupHead *sgh, MpmCtx *mpm_ctx,
         const DetectBufferMpmRegistery *mpm_reg, int list_id);
-InspectionBuffer *DetectFrame2InspectBuffer(DetectEngineThreadCtx *det_ctx,
-        const DetectEngineTransforms *transforms, Packet *p, const Frames *frames,
-        const Frame *frame, const int list_id, const uint32_t idx, const bool first);
 int DetectEngineInspectFrameBufferGeneric(DetectEngineThreadCtx *det_ctx,
         const DetectEngineFrameInspectionEngine *engine, const Signature *s, Packet *p,
         const Frames *frames, const Frame *frame, const uint32_t idx);