diff --git a/js/src/jit/MacroAssembler.cpp b/js/src/jit/MacroAssembler.cpp
index 6721dd4419..9519e8f0eb 100644
--- a/js/src/jit/MacroAssembler.cpp
+++ b/js/src/jit/MacroAssembler.cpp
@@ -2124,6 +2124,7 @@ MacroAssembler::convertTypedOrValueToInt(TypedOrValueRegister src, FloatRegister
       case MIRType::String:
       case MIRType::Symbol:
       case MIRType::Object:
+      case MIRType::BigInt:
         jump(fail);
         break;
       default:
diff --git a/js/src/jit/MacroAssembler.h b/js/src/jit/MacroAssembler.h
index f681456396..e5efb475c6 100644
--- a/js/src/jit/MacroAssembler.h
+++ b/js/src/jit/MacroAssembler.h
@@ -1622,6 +1622,11 @@ class MacroAssembler : public MacroAssemblerSpecific
           case Scalar::Uint32:
             store32(value, dest);
             break;
+          case Scalar::BigInt64:
+          case Scalar::BigUint64:
+            //FIXME: storing 64-bit values doesn't actually work yet.
+            // store64(value, dest);
+            break;
           default:
             MOZ_CRASH("Invalid typed array type");
         }