diff --git a/cpu_ref/rsCpuScript.h b/cpu_ref/rsCpuScript.h
index 43be88b..b84abb3 100644
--- a/cpu_ref/rsCpuScript.h
+++ b/cpu_ref/rsCpuScript.h
@@ -182,7 +182,7 @@
 
     const Script * getScript() {return mScript;}
 
-    void forEachMtlsSetup(const Allocation ** ains, uint32_t inLen,
+    bool forEachMtlsSetup(const Allocation ** ains, uint32_t inLen,
                           Allocation * aout, const void * usr, uint32_t usrLen,
                           const RsScriptCall *sc, MTLaunchStruct *mtls);