diff --git a/zoneminder-config.cmake b/zoneminder-config.cmake
index 21b99abf4..a38f73d84 100644
--- a/zoneminder-config.cmake
+++ b/zoneminder-config.cmake
@@ -43,7 +43,7 @@
 #cmakedefine HAVE_LIBAVCODEC 1
 #cmakedefine HAVE_LIBAVCODEC_AVCODEC_H 1
 #cmakedefine HAVE_LIBAVDEVICE 1
-#cmakedefine HAVE_LIBAVDEVICE_AVDEVICE_H
+#cmakedefine HAVE_LIBAVDEVICE_AVDEVICE_H 1
 #cmakedefine HAVE_LIBAVUTIL 1
 #cmakedefine HAVE_LIBAVUTIL_AVUTIL_H 1
 #cmakedefine HAVE_LIBAVUTIL_MATHEMATICS_H 1