diff --git a/src/util-macset.c b/src/util-macset.c
index a4d1eb664c..7902e06197 100644
--- a/src/util-macset.c
+++ b/src/util-macset.c
@@ -116,7 +116,8 @@ FlowStorageId MacSetGetFlowStorageID(void)
     return g_macset_storage_id;
 }
 
-static inline void MacUpdateEntry(MacSet *ms, uint8_t *addr, int side, ThreadVars *tv, uint16_t ctr)
+static inline void MacUpdateEntry(
+        MacSet *ms, const uint8_t *addr, int side, ThreadVars *tv, uint16_t ctr)
 {
     switch (ms->state[side]) {
         case EMPTY_SET:
@@ -177,8 +178,8 @@ static inline void MacUpdateEntry(MacSet *ms, uint8_t *addr, int side, ThreadVar
     }
 }
 
-void MacSetAddWithCtr(MacSet *ms, uint8_t *src_addr, uint8_t *dst_addr, ThreadVars *tv,
-                      uint16_t ctr_src, uint16_t ctr_dst)
+void MacSetAddWithCtr(MacSet *ms, const uint8_t *src_addr, const uint8_t *dst_addr, ThreadVars *tv,
+        uint16_t ctr_src, uint16_t ctr_dst)
 {
     if (ms == NULL)
         return;
@@ -186,7 +187,7 @@ void MacSetAddWithCtr(MacSet *ms, uint8_t *src_addr, uint8_t *dst_addr, ThreadVa
     MacUpdateEntry(ms, dst_addr, MAC_SET_DST, tv, ctr_dst);
 }
 
-void MacSetAdd(MacSet *ms, uint8_t *src_addr, uint8_t *dst_addr)
+void MacSetAdd(MacSet *ms, const uint8_t *src_addr, const uint8_t *dst_addr)
 {
     MacSetAddWithCtr(ms, src_addr, dst_addr, NULL, 0, 0);
 }
diff --git a/src/util-macset.h b/src/util-macset.h
index 82a3527733..5f60aa2a18 100644
--- a/src/util-macset.h
+++ b/src/util-macset.h
@@ -33,9 +33,9 @@ typedef enum {
 typedef int (*MacSetIteratorFunc)(uint8_t *addr, MacSetSide side, void*);
 
 MacSet *MacSetInit(int size);
-void    MacSetAdd(MacSet*, uint8_t *src_addr, uint8_t *dst_addr);
-void    MacSetAddWithCtr(MacSet*, uint8_t *src_addr, uint8_t *dst_addr, ThreadVars *tv,
-                         uint16_t ctr_src, uint16_t ctr_dst);
+void MacSetAdd(MacSet *, const uint8_t *src_addr, const uint8_t *dst_addr);
+void MacSetAddWithCtr(MacSet *, const uint8_t *src_addr, const uint8_t *dst_addr, ThreadVars *tv,
+        uint16_t ctr_src, uint16_t ctr_dst);
 int     MacSetForEach(const MacSet*, MacSetIteratorFunc, void*);
 int     MacSetSize(const MacSet*);
 void    MacSetReset(MacSet*);