diff --git a/include/asm-powerpc/pgtable-ppc32.h b/include/asm-powerpc/pgtable-ppc32.h
index bdbab72f3ebc91bdaec7e45374914cc1124eea9a..6fe39e327047d16814f345402303efb75e9822b7 100644
--- a/include/asm-powerpc/pgtable-ppc32.h
+++ b/include/asm-powerpc/pgtable-ppc32.h
@@ -401,6 +401,9 @@ extern int icache_44x_need_flush;
 #ifndef _PAGE_COHERENT
 #define _PAGE_COHERENT	0
 #endif
+#ifndef _PAGE_WRITETHRU
+#define _PAGE_WRITETHRU	0
+#endif
 #ifndef _PMD_PRESENT_MASK
 #define _PMD_PRESENT_MASK	_PMD_PRESENT
 #endif