diff --git a/channels/audin/client/mac/audin_mac.c b/channels/audin/client/mac/audin_mac.c
index 07b789477..38c51f265 100644
--- a/channels/audin/client/mac/audin_mac.c
+++ b/channels/audin/client/mac/audin_mac.c
@@ -33,6 +33,9 @@
 #include <winpr/debug.h>
 #include <winpr/cmdline.h>
 
+#define __COREFOUNDATION_CFPLUGINCOM__ 1
+#define IUNKNOWN_C_GUTS void *_reserved; void* QueryInterface; void* AddRef; void* Release
+
 #include <CoreAudio/CoreAudioTypes.h>
 #include <CoreAudio/CoreAudio.h>
 #include <AudioToolbox/AudioToolbox.h>
diff --git a/channels/rdpsnd/client/mac/rdpsnd_mac.c b/channels/rdpsnd/client/mac/rdpsnd_mac.c
index 5867480bd..14af6f609 100644
--- a/channels/rdpsnd/client/mac/rdpsnd_mac.c
+++ b/channels/rdpsnd/client/mac/rdpsnd_mac.c
@@ -34,6 +34,9 @@
 #include <freerdp/types.h>
 #include <freerdp/codec/dsp.h>
 
+#define __COREFOUNDATION_CFPLUGINCOM__ 1
+#define IUNKNOWN_C_GUTS void *_reserved; void* QueryInterface; void* AddRef; void* Release
+
 #include <AudioToolbox/AudioToolbox.h>
 #include <AudioToolbox/AudioQueue.h>