diff --git a/qw/source/cl_cvar.c b/qw/source/cl_cvar.c
index 8a49e318d..188b9088e 100644
--- a/qw/source/cl_cvar.c
+++ b/qw/source/cl_cvar.c
@@ -29,6 +29,12 @@
 #ifdef HAVE_CONFIG_H
 # include "config.h"
 #endif
+#ifdef HAVE_STRING_H
+# include "string.h"
+#endif
+#ifdef HAVE_STRINGS_H
+# include "strings.h"
+#endif
 
 #include "QF/cvar.h"
 #include "QF/msg.h"