diff --git a/subprojects/gst-plugins-base/gst/subparse/gstssaparse.c b/subprojects/gst-plugins-base/gst/subparse/gstssaparse.c
index a9cdcd160c..d6fdb9c9fc 100644
--- a/subprojects/gst-plugins-base/gst/subparse/gstssaparse.c
+++ b/subprojects/gst-plugins-base/gst/subparse/gstssaparse.c
@@ -24,6 +24,8 @@
 #include "config.h"
 #endif
 
+#include <ctype.h>              /* isspace() */
+#include <stdio.h>              /* sscanf() */
 #include <stdlib.h>             /* atoi() */
 #include <string.h>