diff --git a/sys/src/lib9p/ramfs.c b/sys/src/lib9p/ramfs.c
index 13004a4ec..e59b7e0c7 100644
--- a/sys/src/lib9p/ramfs.c
+++ b/sys/src/lib9p/ramfs.c
@@ -53,7 +53,7 @@ fswrite(Req *r)
 	count = r->ifcall.count;
 
 	if(offset+count >= rf->ndata){
-		v = realloc(rf->data, offset+count);
+		v = erealloc9p(rf->data, offset+count);
 		if(v == nil){
 			respond(r, Enomem);
 			return;