diff --git a/clang/include/clang/Sema/Sema.h b/clang/include/clang/Sema/Sema.h
--- a/clang/include/clang/Sema/Sema.h
+++ b/clang/include/clang/Sema/Sema.h
@@ -10114,7 +10114,7 @@
   /// regions.
   /// \param Level Relative level of nested OpenMP construct for that
   /// the check is performed.
-  bool isOpenMPGlobalCapturedDecl(ValueDecl *D, unsigned Level,
+  bool isOpenMPGlobalCapturedDecl(ValueDecl *D, int Level,
                                   unsigned CaptureLevel) const;
 
   ExprResult PerformOpenMPImplicitIntegerConversion(SourceLocation OpLoc,
diff --git a/clang/lib/Sema/SemaOpenMP.cpp b/clang/lib/Sema/SemaOpenMP.cpp
--- a/clang/lib/Sema/SemaOpenMP.cpp
+++ b/clang/lib/Sema/SemaOpenMP.cpp
@@ -2410,7 +2410,7 @@
          Regions[CaptureLevel] != OMPD_task;
 }
 
-bool Sema::isOpenMPGlobalCapturedDecl(ValueDecl *D, unsigned Level,
+bool Sema::isOpenMPGlobalCapturedDecl(ValueDecl *D, int Level,
                                       unsigned CaptureLevel) const {
   assert(LangOpts.OpenMP && "OpenMP is not allowed");
   // Return true if the current level is no longer enclosed in a target region.