diff --git a/visualc/src/include/ngspice/config.h b/visualc/src/include/ngspice/config.h
index a3c6b90ed..983d1b037 100644
--- a/visualc/src/include/ngspice/config.h
+++ b/visualc/src/include/ngspice/config.h
@@ -554,4 +554,4 @@
 
 #define HAVE_XFT
 
-#define EXT_ASC
+//#define EXT_ASC