diff --git a/openpower/package/occ/p9Patches/0001-Use-gnu89-as-C-std.patch b/openpower/package/occ/p9Patches/0001-Use-gnu89-as-C-std.patch
new file mode 100644
index 0000000..2f59d83
--- /dev/null
+++ b/openpower/package/occ/p9Patches/0001-Use-gnu89-as-C-std.patch
@@ -0,0 +1,41 @@
+From 52c55ef2370b22d0f9b78e5d975b3c8b2b915d34 Mon Sep 17 00:00:00 2001
+From: Stewart Smith <stewart@linux.vnet.ibm.com>
+Date: Thu, 2 Mar 2017 17:13:22 +1100
+Subject: [PATCH] Use gnu89 as C std
+
+Change-Id: I1953f9762f6e3c0f1b8005977de69802f0e11934
+Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
+---
+ src/occBootLoader/img_defs.mk | 2 +-
+ src/occ_405/img_defs.mk       | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/src/occBootLoader/img_defs.mk b/src/occBootLoader/img_defs.mk
+index a53d9db115b3..907c3d5ad353 100644
+--- a/src/occBootLoader/img_defs.mk
++++ b/src/occBootLoader/img_defs.mk
+@@ -226,7 +226,7 @@ PIPE-CFLAGS = -pipe -Wa,-m405
+ GCC-CFLAGS += -g -Wall -fsigned-char -msoft-float  \
+ 	-m32 -mbig-endian -mcpu=405 -mmultiple -mstring \
+ 	-meabi -msdata=eabi -ffreestanding -fno-common \
+-	-fno-inline-functions-called-once
++	-fno-inline-functions-called-once -std=gnu89
+ 
+ CFLAGS      =  -c $(GCC-CFLAGS) $(PIPE-CFLAGS) $(GCC-O-LEVEL) $(INCLUDES)
+ 
+diff --git a/src/occ_405/img_defs.mk b/src/occ_405/img_defs.mk
+index abdef45963e0..9e0f1b91596a 100644
+--- a/src/occ_405/img_defs.mk
++++ b/src/occ_405/img_defs.mk
+@@ -252,7 +252,7 @@ PIPE-CFLAGS = -pipe -Wa,-m405
+ GCC-CFLAGS += -g -Wall -fsigned-char -msoft-float  \
+ 	-m32 -mbig-endian -mcpu=405 -mmultiple -mstring \
+ 	-meabi -msdata=eabi -ffreestanding -fno-common \
+-	-fno-inline-functions-called-once
++	-fno-inline-functions-called-once -std=gnu89
+ 
+ CFLAGS      =  -c $(GCC-CFLAGS) $(PIPE-CFLAGS) $(GCC-O-LEVEL) $(INCLUDES)
+ 
+-- 
+2.9.3
+