diff --git a/main/share/gambas.h b/main/share/gambas.h
index a552048e5..20584f5f4 100644
--- a/main/share/gambas.h
+++ b/main/share/gambas.h
@@ -316,6 +316,7 @@ typedef
 #define GB_ERR_TYPE       ((char *)6)
 #define GB_ERR_OVERFLOW   ((char *)7)
 #define GB_ERR_NSYMBOL    ((char *)11)
+#define GB_ERR_NWRITE     ((char *)16)
 #define GB_ERR_NPROPERTY  ((char *)17)
 #define GB_ERR_ARG        ((char *)20)
 #define GB_ERR_BOUND      ((char *)21)