diff --git a/src/libCom/Makefile.Unix b/src/libCom/Makefile.Unix
index d0052ff33..2c7521bc0 100644
--- a/src/libCom/Makefile.Unix
+++ b/src/libCom/Makefile.Unix
@@ -1,5 +1,6 @@
 TOP = ../../..
 include $(TOP)/config/CONFIG_BASE
+CMPLR = STRICT
 
 USR_CFLAGS = -D_NO_PROTO