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