diff --git a/libavdevice/decklink_common.cpp b/libavdevice/decklink_common.cpp
index ff2df95909..c782171f2c 100644
--- a/libavdevice/decklink_common.cpp
+++ b/libavdevice/decklink_common.cpp
@@ -84,7 +84,7 @@ static char *dup_cfstring_to_utf8(CFStringRef w)
 }
 #define DECKLINK_STR    const __CFString *
 #define DECKLINK_STRDUP dup_cfstring_to_utf8
-#define DECKLINK_FREE(s) free((void *) s)
+#define DECKLINK_FREE(s) CFRelease(s)
 #define DECKLINK_BOOL bool
 #else
 #define DECKLINK_STR    const char *