1 files changed, 2 insertions, 0 deletions
diff --git a/src/pnm.c b/src/pnm.c
index 3edbcd3..39574ce 100644
--- a/src/pnm.c
+++ b/src/pnm.c
@@ -8,6 +8,8 @@
 /* This code is based on Fl_PNM_Image.cxx from fltk (http://www.fltk.org)
  */
 
+#include <stdlib.h>
+#include <ctype.h>
 #include <string.h>
 
 #include "pnm.h"