diff --git a/libswscale/swscale_internal.h b/libswscale/swscale_internal.h
index effbae9843..18a79cac54 100644
--- a/libswscale/swscale_internal.h
+++ b/libswscale/swscale_internal.h
@@ -299,6 +299,8 @@ const char *sws_format_name(int format);
 #define is16BPS(x)      (           \
            (x)==PIX_FMT_GRAY16BE    \
         || (x)==PIX_FMT_GRAY16LE    \
+        || (x)==PIX_FMT_RGB48BE     \
+        || (x)==PIX_FMT_RGB48LE     \
         || (x)==PIX_FMT_YUV420PLE   \
         || (x)==PIX_FMT_YUV422PLE   \
         || (x)==PIX_FMT_YUV444PLE   \