diff --git a/arch/powerpc/mm/mmu_context_hash64.c b/arch/powerpc/mm/mmu_context_hash64.c
index 40677aa0190e53b4013ddb535a181cda13390e63..daa076c9025caf42bea1175029d778cedbbbb60a 100644
--- a/arch/powerpc/mm/mmu_context_hash64.c
+++ b/arch/powerpc/mm/mmu_context_hash64.c
@@ -34,7 +34,7 @@ static DEFINE_IDA(mmu_context_ida);
  * Each segment contains 2^28 bytes.  Each context maps 2^44 bytes,
  * so we can support 2^19-1 contexts (19 == 35 + 28 - 44).
  */
-#define MAX_CONTEXT	((1UL << 19) - 1)
+#define MAX_CONTEXT	((1UL << CONTEXT_BITS) - 1)
 
 int __init_new_context(void)
 {