--- a/contrib/slapd-modules/passwd/sha2/Makefile
+++ b/contrib/slapd-modules/passwd/sha2/Makefile
@@ -9,7 +9,7 @@ LDAP_LIB = $(LDAP_BUILD)/libraries/libldap/libldap.la \
 LIBTOOL = $(LDAP_BUILD)/libtool
 INSTALL = /usr/bin/install
 CC = gcc
-OPT = -g -O2
+OPT = -g -O2 -fno-strict-aliasing
 DEFS =
 #DEFS = -DSLAPD_SHA2_DEBUG
 INCS = $(LDAP_INC)