diff --git a/configure.ac b/configure.ac
index 96f18882a..146523bb8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1288,7 +1288,7 @@ AC_ARG_ENABLE(avfoundation,
     [avfoundation_req=auto]
     )
 
-if test "$system?" = MacOSX && test "${avfoundation_req?}" != no
+if test "${system?}" = MacOSX && test "${avfoundation_req?}" != no
 then
 	AVFOUNDATION_LIB="-framework AppKit -framework AVFoundation -framework CoreMedia -framework CoreVideo"
 	AVFOUNDATION_OBJ="src/video_capture/avfoundation.o"
@@ -1296,6 +1296,9 @@ then
 	avfoundation=yes
 fi
 
+ENSURE_FEATURE_PRESENT([${avfoundation_req?}], [${avfoundation?}],
+        [AV Foundation not found])
+
 # ------------------------------------------------------------------------------
 # SDL1/2/3 Stuff
 # ------------------------------------------------------------------------------