diff --git a/debian/rules b/debian/rules
index 92c78e6..c54b2b6 100755
--- a/debian/rules
+++ b/debian/rules
@@ -19,6 +19,7 @@ endif
 F77_TEST_FLAGS = $(F77FLAGS)
 ifneq (,$(filter $(ARCH), i386 lpia hurd-i386 kfreebsd-i386))
   F77_TEST_FLAGS := $(filter-out -O%, $(F77_TEST_FLAGS))
+  F77FLAGS := $(filter-out -O%, $(F77FLAGS))
 endif
 
 SO=3gf