diff --git a/mozilla/security/coreconf/Linux.mk b/mozilla/security/coreconf/Linux.mk
index 86b807d4d63..88ad32a8627 100644
--- a/mozilla/security/coreconf/Linux.mk
+++ b/mozilla/security/coreconf/Linux.mk
@@ -55,7 +55,11 @@ DEFAULT_COMPILER = gcc
 ifeq ($(OS_TEST),m68k)
 	OS_REL_CFLAGS	= -DLINUX1_2 -D_XOPEN_SOURCE
 	CPU_ARCH	= m68k
-else		
+else
+ifeq ($(OS_TEST),ppc64)
+	OS_REL_CFLAGS	= -DLINUX1_2 -D_XOPEN_SOURCE
+	CPU_ARCH	= ppc64
+else
 ifeq ($(OS_TEST),ppc)
 	OS_REL_CFLAGS	= -DLINUX1_2 -D_XOPEN_SOURCE
 	CPU_ARCH	= ppc
@@ -125,6 +129,7 @@ endif
 endif
 endif
 endif
+endif
 
 
 LIBC_TAG		= _glibc