diff --git a/nsock/src/error.h b/nsock/src/error.h
index 20734c147..a8028764a 100644
--- a/nsock/src/error.h
+++ b/nsock/src/error.h
@@ -59,6 +59,8 @@
 #ifndef ERROR_H
 #define ERROR_H
 
+#include "nbase.h"
+
 void fatal(char *fmt, ...)
   __attribute__ ((noreturn))
   __attribute__ ((format (printf, 1, 2)));