diff --git a/clang/include/clang/Sema/Sema.h b/clang/include/clang/Sema/Sema.h
index 851b25922f5a7b..b95a5017d90794 100644
--- a/clang/include/clang/Sema/Sema.h
+++ b/clang/include/clang/Sema/Sema.h
@@ -1725,7 +1725,9 @@ class Sema final {
 
 public:
   /// Get the module owning an entity.
-  Module *getOwningModule(Decl *Entity) { return Entity->getOwningModule(); }
+  Module *getOwningModule(const Decl *Entity) {
+    return Entity->getOwningModule();
+  }
 
   /// Make a merged definition of an existing hidden definition \p ND
   /// visible at the specified location.
diff --git a/clang/lib/Sema/SemaOverload.cpp b/clang/lib/Sema/SemaOverload.cpp
index be02a199a51aab..56d9522eee01a9 100644
--- a/clang/lib/Sema/SemaOverload.cpp
+++ b/clang/lib/Sema/SemaOverload.cpp
@@ -9673,8 +9673,7 @@ bool Sema::isEquivalentInternalLinkageDeclaration(const NamedDecl *A,
   // entity in different modules.
   if (!VA->getDeclContext()->getRedeclContext()->Equals(
           VB->getDeclContext()->getRedeclContext()) ||
-      getOwningModule(const_cast<ValueDecl *>(VA)) ==
-          getOwningModule(const_cast<ValueDecl *>(VB)) ||
+      getOwningModule(VA) == getOwningModule(VB) ||
       VA->isExternallyVisible() || VB->isExternallyVisible())
     return false;
 
@@ -9711,12 +9710,12 @@ void Sema::diagnoseEquivalentInternalLinkageDeclarations(
     SourceLocation Loc, const NamedDecl *D, ArrayRef<const NamedDecl *> Equiv) {
   Diag(Loc, diag::ext_equivalent_internal_linkage_decl_in_modules) << D;
 
-  Module *M = getOwningModule(const_cast<NamedDecl*>(D));
+  Module *M = getOwningModule(D);
   Diag(D->getLocation(), diag::note_equivalent_internal_linkage_decl)
       << !M << (M ? M->getFullModuleName() : "");
 
   for (auto *E : Equiv) {
-    Module *M = getOwningModule(const_cast<NamedDecl*>(E));
+    Module *M = getOwningModule(E);
     Diag(E->getLocation(), diag::note_equivalent_internal_linkage_decl)
         << !M << (M ? M->getFullModuleName() : "");
   }