diff --git a/config/CONFIG.Vx.V69-ppc604 b/config/CONFIG.Vx.V69-ppc604
index ac5828fc8..23b324897 100644
--- a/config/CONFIG.Vx.V69-ppc604
+++ b/config/CONFIG.Vx.V69-ppc604
@@ -12,6 +12,6 @@ CMPLR_SUFFIX = ppc
 ARCH_CLASS = ppc
 
 # Architecture specific build flags 
-ARCH_DEP_CPPFLAGS = -mcpu=604 -DCPU=PPC604 
-ARCH_DEP_CFLAGS = -mstrict-align -mlongcall -fno-implicit-fp
-ARCH_DEP_CXXFLAGS = $(ARCH_DEP_CFLAGS)
+ARCH_DEP_CPPFLAGS = -mcpu=604 -DCPU=PPC604 -D_VXWORKS_COMPATIBILITY_MODE -DBSD=44
+ARCH_DEP_CFLAGS = -mstrict-align -mlongcall -fno-implicit-fp -fno-strict-aliasing
+VENDOR_DEP_CFLAGS = -std=c99