diff --git a/win32/build/config.w32 b/win32/build/config.w32
index f00584eaa93..358ff4e0cef 100644
--- a/win32/build/config.w32
+++ b/win32/build/config.w32
@@ -167,13 +167,16 @@ if (VCVERS >= 1400) {
 }
 
 ARG_WITH('mp', 'Tell Visual Studio use up to [n,auto,disable] processes for compilation', 'auto');
+var PHP_MP_DISABLED = true;
 if (VCVERS >= 1500 && PHP_MP != 'disable') {
 		// no from disable-all 
 		if(PHP_MP == 'auto' || PHP_MP == 'no') {
 			 ADD_FLAG('CFLAGS', ' /MP ');
+			PHP_MP_DISABLED = false;
 		} else {
 			if(parseInt(PHP_MP) != 0) {
 				ADD_FLAG('CFLAGS', ' /MP'+ PHP_MP +' ');
+				PHP_MP_DISABLED = false;
 			} else {
 				STDOUT.WriteLine('WARNING: Invalid argument for MP: ' + PHP_MP);
 			}
diff --git a/win32/build/confutils.js b/win32/build/confutils.js
index ae668fee260..b6d59005e9a 100644
--- a/win32/build/confutils.js
+++ b/win32/build/confutils.js
@@ -1429,7 +1429,7 @@ function ADD_SOURCES(dir, file_list, target, obj_dir)
 		obj = src.replace(re, ".obj");
 		tv += " " + sub_build + obj;
 
-		if (!MODE_PHPIZE && PHP_ONE_SHOT == "yes") {
+		if (!MODE_PHPIZE && !PHP_MP_DISABLED) {
 			if (i > 0) {
 				objs_line += " " + sub_build + obj;	
 				srcs_line += " " + dir + "\\" + src;
@@ -1448,7 +1448,7 @@ function ADD_SOURCES(dir, file_list, target, obj_dir)
 		}
 	}
 
-	if (!MODE_PHPIZE && PHP_ONE_SHOT == "yes") {
+	if (!MODE_PHPIZE && !PHP_MP_DISABLED) {
 		MFO.WriteLine(objs_line + ": " + srcs_line);
 		MFO.WriteLine("\t$(CC) $(" + flags + ") $(CFLAGS) /Fo" + sub_build + " $(" + bd_flags_name + ") /c " + srcs_line);
 	}