diff --git a/SPECS/nss.spec b/SPECS/nss.spec
index 984a6fe6..94b388c1 100644
--- a/SPECS/nss.spec
+++ b/SPECS/nss.spec
@@ -20,6 +20,8 @@
 %define alt_ckbi  libnssckbi.so
 %endif
 
+%global optflags %(echo %{optflags} | sed 's/-O3/-O2/')
+
 # Define if using a source archive like "nss-version.with.ckbi.version".
 # To "disable", add "#" to start of line, AND a space after "%".
 #% define nss_ckbi_suffix .with.ckbi.1.93