diff --git a/givaro.spec b/givaro.spec
index c55005c..5e11c8d 100644
--- a/givaro.spec
+++ b/givaro.spec
@@ -65,8 +65,8 @@ export CFLAGS=$(sed 's/ -Wp,-D_GLIBCXX_ASSERTIONS//' <<< '%{optflags}')
 export CXXFLAGS="$CFLAGS"
 %ifarch %{ix86}
 # Excess precision leads to test failures
-export CFLAGS="%{optflags} -ffloat-store"
-export CXXFLAGS="%{optflags} -ffloat-store"
+export CFLAGS="$CFLAGS -ffloat-store"
+export CXXFLAGS="$CXXFLAGS -ffloat-store"
 %endif
 %ifarch s390x
 %global optflags %optflags -ffp-contract=off