diff --git a/ext/opencv/Makefile.am b/ext/opencv/Makefile.am
index 140d0449fb..05c7b525c8 100644
--- a/ext/opencv/Makefile.am
+++ b/ext/opencv/Makefile.am
@@ -19,7 +19,7 @@ libgstopencv_la_SOURCES = gstopencv.cpp \
 			gsttextoverlay.c \
 			gstmotioncells.c \
 			gstskindetect.c \
-			gstretinex.c \
+			gstretinex.cpp \
 			gstfacedetect.cpp \
 			gstsegmentation.cpp \
 			gstgrabcut.cpp \
diff --git a/ext/opencv/gstretinex.c b/ext/opencv/gstretinex.cpp
similarity index 100%
rename from ext/opencv/gstretinex.c
rename to ext/opencv/gstretinex.cpp