diff --git a/configure/os/CONFIG.Common.vxWorksCommon b/configure/os/CONFIG.Common.vxWorksCommon
index 0b44393a9..eefde3d5a 100644
--- a/configure/os/CONFIG.Common.vxWorksCommon
+++ b/configure/os/CONFIG.Common.vxWorksCommon
@@ -101,13 +101,6 @@ CODE_CXXFLAGS =
 POSIX_CPPFLAGS_YES = -D_POSIX_SOURCE
 POSIX_CPPFLAGS_NO =
 
-#--------------------------------------------------
-# Optimization flag overrides
-OPT_CFLAGS_YES = -O3
-OPT_CFLAGS_NO =
-OPT_CXXFLAGS_YES = -O3
-OPT_CXXFLAGS_NO =
-
 #--------------------------------------------------
 # osithead use default stack, YES or NO override
 OSITHREAD_USE_DEFAULT_STACK = NO