diff --git a/js/src/vm/Interpreter.cpp b/js/src/vm/Interpreter.cpp
index db5e01803b..ad52234a31 100644
--- a/js/src/vm/Interpreter.cpp
+++ b/js/src/vm/Interpreter.cpp
@@ -1960,13 +1960,8 @@ CASE(JSOP_RETRVAL)
 
         /* Resume execution in the calling frame. */
         if (MOZ_LIKELY(interpReturnOK)) {
-            
-            if (JSOp(*REGS.pc) == JSOP_RESUME) {
-                ADVANCE_AND_DISPATCH(JSOP_RESUME_LENGTH);
-            }
-
             TypeScript::Monitor(cx, script, REGS.pc, REGS.sp[-1]);
-            MOZ_ASSERT(CodeSpec[*REGS.pc].length == JSOP_CALL_LENGTH);            
+
             ADVANCE_AND_DISPATCH(JSOP_CALL_LENGTH);
         }
 
diff --git a/js/src/vm/Opcodes.h b/js/src/vm/Opcodes.h
index c5be5f6bef..ad140ff7bc 100644
--- a/js/src/vm/Opcodes.h
+++ b/js/src/vm/Opcodes.h
@@ -2106,7 +2106,7 @@
      *   Operands: resume kind (GeneratorObject::ResumeKind)
      *   Stack: gen, val => rval
      */ \
-    macro(JSOP_RESUME,        205,"resume",      NULL,    2,  2,  1,  JOF_UINT16|JOF_INVOKE) \
+    macro(JSOP_RESUME,        205,"resume",      NULL,    3,  2,  1,  JOF_UINT8|JOF_INVOKE) \
     /*
      * Pops the top two values on the stack as 'obj' and 'v', pushes 'v' to
      * 'obj'.
diff --git a/js/src/vm/TypeInference.cpp b/js/src/vm/TypeInference.cpp
index 8ed6e885f8..a36926eb94 100644
--- a/js/src/vm/TypeInference.cpp
+++ b/js/src/vm/TypeInference.cpp
@@ -3335,7 +3335,9 @@ js::TypeMonitorResult(JSContext* cx, JSScript* script, jsbytecode* pc, TypeSet::
 void
 js::TypeMonitorResult(JSContext* cx, JSScript* script, jsbytecode* pc, const js::Value& rval)
 {
-    MOZ_ASSERT(CodeSpec[*pc].format & JOF_TYPESET);
+    /* Allow the non-TYPESET scenario to simplify stubs used in compound opcodes. */
+    if (!(CodeSpec[*pc].format & JOF_TYPESET))
+        return;
 
     if (!script->hasBaselineScript())
         return;