diff --git a/js/src/jit/IonTypes.h b/js/src/jit/IonTypes.h
index 12e7a0e4701d..68486845e836 100644
--- a/js/src/jit/IonTypes.h
+++ b/js/src/jit/IonTypes.h
@@ -487,6 +487,8 @@ StringFromMIRType(MIRType type)
       return "MagicUninitializedLexical";
     case MIRType_Value:
       return "Value";
+    case MIRType_ObjectOrNull:
+      return "ObjectOrNull";
     case MIRType_None:
       return "None";
     case MIRType_Slots:
@@ -495,10 +497,16 @@ StringFromMIRType(MIRType type)
       return "Elements";
     case MIRType_Pointer:
       return "Pointer";
-    case MIRType_Int32x4:
-      return "Int32x4";
+    case MIRType_Shape:
+      return "Shape";
+    case MIRType_ObjectGroup:
+      return "ObjectGroup";
     case MIRType_Float32x4:
       return "Float32x4";
+    case MIRType_Int32x4:
+      return "Int32x4";
+    case MIRType_Doublex2:
+      return "Doublex2";
     default:
       MOZ_CRASH("Unknown MIRType.");
   }