diff --git a/visualc/src/include/ngspice/config.h b/visualc/src/include/ngspice/config.h
index 18840505a..7ac24e603 100644
--- a/visualc/src/include/ngspice/config.h
+++ b/visualc/src/include/ngspice/config.h
@@ -465,7 +465,7 @@
 /* #undef NEWPRED */
 
 /* Do not trigger unwanted traps by default */
-/* #undef NEWTRUNC */
+#define NEWTRUNC
 
 /* Define if we want NOBYPASS */
 /* #undef NOBYPASS */
@@ -490,7 +490,7 @@
 #define PACKAGE_VERSION VERSION
 
 /* Define if we want predictor algorithm */
-/* #undef PREDICTOR */
+#define PREDICTOR
 
 /* Define to 1 if the C compiler supports function prototypes. */
 /* #undef PROTOTYPES */