diff --git a/js/src/jit/MCallOptimize.cpp b/js/src/jit/MCallOptimize.cpp
index 6352ec89941..92121b2aa2f 100644
--- a/js/src/jit/MCallOptimize.cpp
+++ b/js/src/jit/MCallOptimize.cpp
@@ -775,9 +775,9 @@ IonBuilder::inlineMathPow(CallInfo &callInfo)
 
     if (outputType != MIRType_Int32 && outputType != MIRType_Double)
         return InliningStatus_NotInlined;
-    if (baseType != MIRType_Int32 && baseType != MIRType_Double)
+    if (!IsNumberType(baseType))
         return InliningStatus_NotInlined;
-    if (powerType != MIRType_Int32 && powerType != MIRType_Double)
+    if (!IsNumberType(powerType))
         return InliningStatus_NotInlined;
 
     callInfo.setImplicitlyUsedUnchecked();