diff --git a/src/dwm.c b/src/dwm.c
index 64d0cbc..3031abc 100644
--- a/src/dwm.c
+++ b/src/dwm.c
@@ -1860,7 +1860,7 @@ switchgaps(const Arg *arg)
 	selmon->gapidx %= modeslen;
 
 	selmon->gappx = gapmodes[selmon->gapidx];
-	printf("####### GAPPX=%d GAPIDX=%d\n", selmon->gappx, selmon->gapidx);
+	fprintf(stderr, "####### GAPPX=%d GAPIDX=%d\n", selmon->gappx, selmon->gapidx);
 	arrange(selmon);
 }