diff --git a/src/cmd/acme/dat.h b/src/cmd/acme/dat.h
index 075ffe22..a0d5cef3 100644
--- a/src/cmd/acme/dat.h
+++ b/src/cmd/acme/dat.h
@@ -565,4 +565,4 @@ Channel	*cwarn;		/* chan(void*)[1] (really chan(unit)[1]) */
 
 QLock	editoutlk;
 
-#define	STACK	32768
+#define	STACK	65536