diff --git a/SuperLU.spec b/SuperLU.spec
index 71e3c22..3189808 100644
--- a/SuperLU.spec
+++ b/SuperLU.spec
@@ -65,12 +65,15 @@ do
    [ "$(file $file | awk '{print $2}')" = ELF ] && rm $file || :
 done
 
+# Change optimization level
+sed -i.bak '/NOOPTS/d' make.inc.in
+sed -e 's|-O0|-O2|g' -i SRC/CMakeLists.txt
+
 %build
 mkdir -p build; cd build
 
 # Do not use bundled CBLAS code
-%cmake3 -Denable_blaslib:BOOL=OFF ..
-
+%cmake3 -Denable_blaslib:BOOL=OFF -DCMAKE_BUILD_TYPE:STRING=Release ..
 %make_build
 
 %install