diff --git a/src/include/string.h b/src/include/string.h
index 44f244c733..77985e1325 100644
--- a/src/include/string.h
+++ b/src/include/string.h
@@ -4,6 +4,12 @@
 #include <stddef.h>
 #include <stdlib.h>
 
+/* Stringify a token */
+#ifndef STRINGIFY
+#define _STRINGIFY(x)	#x
+#define STRINGIFY(x)	_STRINGIFY(x)
+#endif
+
 void *memcpy(void *dest, const void *src, size_t n);
 void *memmove(void *dest, const void *src, size_t n);
 void *memset(void *s, int c, size_t n);