diff --git a/armsrc/dbprint.c b/armsrc/dbprint.c
index 7be7bba4c..218223231 100644
--- a/armsrc/dbprint.c
+++ b/armsrc/dbprint.c
@@ -74,7 +74,7 @@ void Dbprintf(const char *fmt, ...) {
 }
 
 // prints HEX & ASCII
-void Dbhexdump(int len, uint8_t *d, bool bAsci) {
+void Dbhexdump(int len, const uint8_t *d, bool bAsci) {
 #if DEBUG
     char ascii[9];
 
@@ -103,9 +103,9 @@ void Dbhexdump(int len, uint8_t *d, bool bAsci) {
 #endif
 }
 
-void print_result(const char *name, uint8_t *buf, size_t len) {
+void print_result(const char *name, const uint8_t *buf, size_t len) {
 
-    uint8_t *p = buf;
+    const uint8_t *p = buf;
     uint16_t tmp = len & 0xFFF0;
 
     for (; p - buf < tmp; p += 16) {
diff --git a/armsrc/dbprint.h b/armsrc/dbprint.h
index f22f965c5..0795db274 100644
--- a/armsrc/dbprint.h
+++ b/armsrc/dbprint.h
@@ -26,8 +26,8 @@ void DbpString(const char *str);
 void DbpStringEx(uint32_t flags, const char *src, size_t srclen);
 void Dbprintf(const char *fmt, ...);
 void DbprintfEx(uint32_t flags, const char *fmt, ...);
-void Dbhexdump(int len, uint8_t *d, bool bAsci);
-void print_result(const char *name, uint8_t *buf, size_t len);
+void Dbhexdump(int len, const uint8_t *d, bool bAsci);
+void print_result(const char *name, const uint8_t *buf, size_t len);
 //void PrintToSendBuffer(void);
 
 #endif