diff --git a/configure/os/CONFIG.win32-x86.win32-x86 b/configure/os/CONFIG.win32-x86.win32-x86
index 29c15d3be..615332f19 100644
--- a/configure/os/CONFIG.win32-x86.win32-x86
+++ b/configure/os/CONFIG.win32-x86.win32-x86
@@ -136,6 +136,16 @@ STATIC_LDLIBS_NO=
 STATIC_LDFLAGS=
 RANLIB=
 
+#
+# option needed for parallel builds with Visual Studio 2015 onward
+#
+# -FS Force Synchronous PDB Writes
+ifneq ($(VisualStudioVersion),)
+  OPT_CXXFLAGS_NO += -FS
+  OPT_CFLAGS_NO += -FS
+endif
+
+
 #
 # add -profile here to run the ms profiler
 # -LTCG whole program optimization