diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index 164fb2f..1057def 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -1290,7 +1290,7 @@
       parm->setScopeInfo(0, i);
       Params.push_back(parm);
     }
-    New->setParams(Params.data(), Params.size());
+    New->setParams(Params);
   }
 
   AddKnownFunctionAttributes(New);
@@ -1853,7 +1853,7 @@
         Params.push_back(Param);
       }
 
-      New->setParams(Params.data(), Params.size());
+      New->setParams(Params);
     }
 
     return MergeCompatibleFunctionDecls(New, Old);
@@ -4873,7 +4873,7 @@
            "Should not need args for typedef of non-prototype fn");
   }
   // Finally, we know we have the right number of parameters, install them.
-  NewFD->setParams(Params.data(), Params.size());
+  NewFD->setParams(Params);
 
   // Process the non-inheritable attributes on this declaration.
   ProcessDeclAttributes(S, NewFD, D,