diff --git a/src/http/modules/perl/Makefile.PL b/src/http/modules/perl/Makefile.PL

index 7edadcb..2ebb7c4 100644

--- a/src/http/modules/perl/Makefile.PL

+++ b/src/http/modules/perl/Makefile.PL

@@ -14,7 +14,7 @@ WriteMakefile(

     AUTHOR            => 'Igor Sysoev',

     CCFLAGS           => "$ENV{NGX_PM_CFLAGS}",

-    OPTIMIZE          => '-O',

+    OPTIMIZE          => '-O2',

     LDDLFLAGS         => "$ENV{NGX_PM_LDFLAGS}",