diff --git a/gfx/display_servers/dispserv_x11.c b/gfx/display_servers/dispserv_x11.c
index e39a087e45..86672763a8 100644
--- a/gfx/display_servers/dispserv_x11.c
+++ b/gfx/display_servers/dispserv_x11.c
@@ -19,6 +19,7 @@
 #include <math.h>
 
 #include <compat/strl.h>
+#include <string/stdstring.h>
 
 #include <sys/types.h>
 #include <unistd.h>