diff --git a/visualc/include/ngspice/config.h b/visualc/include/ngspice/config.h
index 5b4ffe2d3..e6074867a 100644
--- a/visualc/include/ngspice/config.h
+++ b/visualc/include/ngspice/config.h
@@ -441,6 +441,19 @@
 /* Do not trigger unwanted traps by default */
 /* #undef NEWTRUNC */
 
+#ifdef NGDEBUG
+#ifdef CONFIG64
+/* Define the directory for executables */
+#define NGSPICEBINDIR "C:/Spice64d/bin"
+/* Define the directory for architecture independent data files */
+#define NGSPICEDATADIR "C:/Spice64d/share/ngspice"
+#else
+/* Define the directory for executables */
+#define NGSPICEBINDIR "C:/Spiced/bin"
+/* Define the directory for architecture independent data files */
+#define NGSPICEDATADIR "C:/Spiced/share/ngspice"
+#endif
+#else
 #ifdef CONFIG64
 /* Define the directory for executables */
 #define NGSPICEBINDIR "C:/Spice64/bin"
@@ -452,6 +465,7 @@
 /* Define the directory for architecture independent data files */
 #define NGSPICEDATADIR "C:/Spice/share/ngspice"
 #endif
+#endif
 
 /* Define if we want NOBYPASS */
 /* #undef NOBYPASS */