diff --git a/include/llvm/ADT/APInt.h b/include/llvm/ADT/APInt.h
index b1790f86bae..1799b21b183 100644
--- a/include/llvm/ADT/APInt.h
+++ b/include/llvm/ADT/APInt.h
@@ -1046,7 +1046,7 @@ public:
     if (isSingleWord())
       return int64_t(VAL << (APINT_BITS_PER_WORD - BitWidth)) >> 
                      (APINT_BITS_PER_WORD - BitWidth);
-    assert(getActiveBits() <= 64 && "Too many bits for int64_t");
+    assert(getMinSignedBits() <= 64 && "Too many bits for int64_t");
     return int64_t(pVal[0]);
   }