diff --git a/src/common/capwap.c b/src/common/capwap.c
index 92ceb14..574bb0a 100644
--- a/src/common/capwap.c
+++ b/src/common/capwap.c
@@ -144,7 +144,7 @@ char* capwap_duplicate_string(const char* source) {
 }
 
 /* Buffer clone */
-void* capwap_clone(void* buffer, int buffersize) {
+void* capwap_clone(const void* buffer, int buffersize) {
 	void* bufferclone;
 	
 	ASSERT(buffer != NULL);
diff --git a/src/common/capwap.h b/src/common/capwap.h
index 34307a5..4a47e9f 100644
--- a/src/common/capwap.h
+++ b/src/common/capwap.h
@@ -106,7 +106,7 @@ void capwap_daemon(void);
 
 /* Helper buffer copy */
 char* capwap_duplicate_string(const char* source);
-void* capwap_clone(void* buffer, int buffersize);
+void* capwap_clone(const void* buffer, int buffersize);
 
 /* */
 char* capwap_itoa(int input, char* output);