diff --git a/audio/coreaudio.c b/audio/coreaudio.c
index 0a26413..3bd75cd 100644
--- a/audio/coreaudio.c
+++ b/audio/coreaudio.c
@@ -56,7 +56,7 @@
 
 static void coreaudio_logstatus (OSStatus status)
 {
-    char *str = "BUG";
+    const char *str = "BUG";
 
     switch(status) {
     case kAudioHardwareNoError: