diff --git a/src/osx/core/mimetype.cpp b/src/osx/core/mimetype.cpp
index fcc076a7d8..5a6e534d5a 100644
--- a/src/osx/core/mimetype.cpp
+++ b/src/osx/core/mimetype.cpp
@@ -199,7 +199,7 @@ wxString GetPathForIconFile( CFBundleRef bundle, CFStringRef iconFile )
         OSStatus status = LSGetExtensionInfo( wholeString.length, buffer, &periodIndex );
 
         // Deallocate the buffer
-        delete buffer;
+        delete [] buffer;
 
         // If the period could not be located it will not be possible to get the URL
         if( status != noErr || periodIndex == kLSInvalidExtensionIndex )