diff --git a/src/pprint.c b/src/pprint.c
index 7d944b857af011b02ce9a698c81981217c57dcf8..6a19a1d81799874b80046820acf49cf72b7f708f 100644
--- a/src/pprint.c
+++ b/src/pprint.c
@@ -23,7 +23,6 @@
 #include "internal.h"
 #include <stdlib.h>
 #include <inttypes.h>
-#include <ctype.h>
 
 typedef struct pp_state {
   int delta;