diff --git a/configure/os/CONFIG.Common.V69-ppc604 b/configure/os/CONFIG.Common.V69-ppc604
index 6ca620ccf..afb6c03d6 100644
--- a/configure/os/CONFIG.Common.V69-ppc604
+++ b/configure/os/CONFIG.Common.V69-ppc604
@@ -1,3 +1,6 @@
 include $(CONFIG)/os/CONFIG.Common.vxWorks-ppc604_long
 VXWORKS_VERSION = 6.9
 export LD_LIBRARY_PATH=$(WIND_BASE)/lmapi-5.0/$(WIND_HOST_TYPE)/lib
+
+# -fno-implicit-fp causes error: "unable to find a register to spill in class 'FLOAT_REGS'"
+ARCH_DEP_CFLAGS =  -mcpu=604 -mstrict-align