diff --git a/src/image.c b/src/image.c
index 485e08a66e0..025ee72703c 100644
--- a/src/image.c
+++ b/src/image.c
@@ -135,11 +135,13 @@ typedef struct ns_bitmap_record Bitmap_Record;
 # define COLOR_TABLE_SUPPORT 1
 #endif
 
+#ifdef HAVE_RSVG
 #if defined HAVE_NS
 # define FRAME_SCALE_FACTOR(f) ns_frame_scale_factor (f)
 #else
 # define FRAME_SCALE_FACTOR(f) 1;
 #endif
+#endif
 
 static void image_disable_image (struct frame *, struct image *);
 static void image_edge_detection (struct frame *, struct image *, Lisp_Object,