diff --git a/js/src/ion/IonBuilder.cpp b/js/src/ion/IonBuilder.cpp
index 94b6aa01161..53c57bfdefe 100644
--- a/js/src/ion/IonBuilder.cpp
+++ b/js/src/ion/IonBuilder.cpp
@@ -2885,7 +2885,7 @@ IonBuilder::jsop_call_inline(HandleFunction callee, uint32 argc, bool constructi
 }
 
 bool
-IonBuilder::makeInliningDecision(AutoObjectVector &targets, uint32 argc)
+IonBuilder::makeInliningDecision(AutoObjectVector &targets)
 {
     if (inliningDepth >= js_IonOptions.maxInlineDepth)
         return false;
@@ -2913,12 +2913,6 @@ IonBuilder::makeInliningDecision(AutoObjectVector &targets, uint32 argc)
 
         JSScript *script = target->script();
         uint32_t calleeUses = script->getUseCount();
-
-        if (target->nargs < argc) {
-            IonSpew(IonSpew_Inlining, "Not inlining, overflow of arguments.");
-            return false;
-        }
-
         totalSize += script->length;
         if (totalSize > js_IonOptions.inlineMaxTotalBytecodeLength)
             return false;
@@ -3716,7 +3710,7 @@ IonBuilder::jsop_call(uint32 argc, bool constructing)
             }
         }
 
-        if (numTargets > 0 && makeInliningDecision(targets, argc))
+        if (numTargets > 0 && makeInliningDecision(targets))
             return inlineScriptedCall(targets, argc, constructing, types, barrier);
     }
 
diff --git a/js/src/ion/IonBuilder.h b/js/src/ion/IonBuilder.h
index f87f0f60104..16edf7fc179 100644
--- a/js/src/ion/IonBuilder.h
+++ b/js/src/ion/IonBuilder.h
@@ -399,7 +399,7 @@ class IonBuilder : public MIRGenerator
                           Vector<MDefinition *, 8, IonAllocPolicy> &retvalDefns);
     bool inlineScriptedCall(AutoObjectVector &targets, uint32 argc, bool constructing,
                             types::StackTypeSet *types, types::StackTypeSet *barrier);
-    bool makeInliningDecision(AutoObjectVector &targets, uint32 argc);
+    bool makeInliningDecision(AutoObjectVector &targets);
 
     MCall *makeCallHelper(HandleFunction target, uint32 argc, bool constructing);
     bool makeCallBarrier(HandleFunction target, uint32 argc, bool constructing,