diff --git a/configure/os/CONFIG.win32-x86.win32-x86 b/configure/os/CONFIG.win32-x86.win32-x86
index 02b5c0143..4424ac5a6 100644
--- a/configure/os/CONFIG.win32-x86.win32-x86
+++ b/configure/os/CONFIG.win32-x86.win32-x86
@@ -43,7 +43,7 @@ WARN_CFLAGS_NO =  -W1
 # -MD use MSVCRT (run-time as DLL, multi-thread support)
 # -GL whole program optimization
 # -Zi generate program database for debugging information
-OPT_CFLAGS_YES = -Ox -GL
+OPT_CFLAGS_YES = -Ox -GL -Oy-
 
 #
 # -Zi generate program database for debugging information
@@ -107,7 +107,7 @@ WARN_CXXFLAGS_NO =  -W1
 # -Ox maximum optimizations
 # -GL whole program optimization
 # -Zi generate program database for debugging information
-OPT_CXXFLAGS_YES = -Ox -GL
+OPT_CXXFLAGS_YES = -Ox -GL -Oy-
 
 #
 # -Zi generate program database for debugging information