diff --git a/src/lisp/Config.x86_freebsd b/src/lisp/Config.x86_freebsd
index 5cf366fbab16f4e65dc4f79f80555e3a7ab045d6..39a6a53e8950d90e357c32488afae2e6a22a9702 100644
--- a/src/lisp/Config.x86_freebsd
+++ b/src/lisp/Config.x86_freebsd
@@ -3,7 +3,7 @@ include Config.x86_common
 # Set the path to your verison of GCC here.
 CC = gcc -m32
 
-CFLAGS += -O2
+CFLAGS += $(COPT)
 CPPFLAGS += -march=pentium4 -mfpmath=sse
 
 UNDEFSYMPATTERN = -Xlinker -u -Xlinker &