diff --git a/configure/os/CONFIG.Common.T2-ppc604 b/configure/os/CONFIG.Common.T2-ppc604
index f056175a6..630845196 100644
--- a/configure/os/CONFIG.Common.T2-ppc604
+++ b/configure/os/CONFIG.Common.T2-ppc604
@@ -3,6 +3,6 @@ VXWORKS_VERSION = 5.5
 WIND_BASE = /afs/psi.ch/project/vxworks/Tornado2.2
 
 #there is a problem with our ccppc and optimization
-# -O and -O0 work, -O1 and higher are buggy
-OPT_CFLAGS_YES = -O
-OPT_CXXFLAGS_YES = -O
+# -O0 works, -O and -O1 and higher are buggy
+OPT_CFLAGS_YES = -O0
+OPT_CXXFLAGS_YES = -O0