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}",