diff --git a/compat/compat.c b/compat/compat.c
index 4de76e1564..ec0f8d5cac 100644
--- a/compat/compat.c
+++ b/compat/compat.c
@@ -15,6 +15,7 @@
 
 #include "getopt_rarch.h"
 #include "strl.h"
+#include "strcasestr.h"
 #include "posix_string.h"
 
 #ifndef HAVE_GETOPT_LONG