diff --git a/src/port/win32env.c b/src/port/win32env.c
index 40df88990fd..29953a50912 100644
--- a/src/port/win32env.c
+++ b/src/port/win32env.c
@@ -40,24 +40,45 @@ pgwin32_putenv(const char *envval)
 		{
 			"msvcrt", NULL, NULL
 		},						/* Visual Studio 6.0 / MinGW */
+		{
+			"msvcrtd", NULL, NULL
+		},
 		{
 			"msvcr70", NULL, NULL
 		},						/* Visual Studio 2002 */
+		{
+			"msvcr70d", NULL, NULL
+		},
 		{
 			"msvcr71", NULL, NULL
 		},						/* Visual Studio 2003 */
+		{
+			"msvcr71d", NULL, NULL
+		},
 		{
 			"msvcr80", NULL, NULL
 		},						/* Visual Studio 2005 */
+		{
+			"msvcr80d", NULL, NULL
+		},
 		{
 			"msvcr90", NULL, NULL
 		},						/* Visual Studio 2008 */
+		{
+			"msvcr90d", NULL, NULL
+		},
 		{
 			"msvcr100", NULL, NULL
 		},						/* Visual Studio 2010 */
+		{
+			"msvcr100d", NULL, NULL
+		},
 		{
 			"msvcr110", NULL, NULL
 		},						/* Visual Studio 2012 */
+		{
+			"msvcr110d", NULL, NULL
+		},
 		{
 			NULL, NULL, NULL
 		}