diff --git a/subreader.h b/subreader.h
index 7a83e573c1..8b9dc19817 100644
--- a/subreader.h
+++ b/subreader.h
@@ -1,6 +1,8 @@
 #ifndef __MPLAYER_SUBREADER_H
 #define __MPLAYER_SUBREADER_H
 
+#include <stdio.h>
+
 extern int suboverlap_enabled;
 extern int sub_no_text_pp;  // disable text post-processing
 extern int sub_match_fuzziness;