diff --git a/firefox.spec b/firefox.spec
index 7dff6aa..e6e85eb 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -199,7 +199,7 @@ mk_add_options MOZ_MAKE_FLAGS="%{_smp_mflags}"
 mk_add_options MOZ_OBJDIR=@TOPSRCDIR@/../obj
 ac_add_options --host=%{_host}
 ac_add_options --target=%{_target_platform}
-ac_add_options --enable-optimize
+ac_add_options --enable-optimize="-O0"
 ac_add_options --prefix="%{_prefix}"
 ac_add_options --libdir="%{_libdir}"
 ac_add_options --sysconfdir="%{_sysconfdir}"