diff --git a/clang/include/clang/AST/Decl.h b/clang/include/clang/AST/Decl.h
index 254e050b77772147a8403e7952c937675fdce433..a23159fcec008b4a8969b1d2d9e09e068979dc85 100644
--- a/clang/include/clang/AST/Decl.h
+++ b/clang/include/clang/AST/Decl.h
@@ -2482,8 +2482,9 @@ public:
 
   /// Returns the minimum number of arguments needed to call this function. This
   /// may be fewer than the number of function parameters, if some of the
-  /// parameters have default arguments (in C++).
-  unsigned getMinRequiredArguments() const;
+  /// parameters have default arguments (in C++) or contain "this" parameter (in
+  /// BSC).
+  unsigned getMinRequiredArguments(bool HasBSCScopeSpec = false) const;
 
   /// Determine whether this function has a single parameter, or multiple
   /// parameters where all but the first have default arguments.
diff --git a/clang/lib/AST/Decl.cpp b/clang/lib/AST/Decl.cpp
index 5eb7167057313e1f15902b64b82a9d154a21e963..5069c6ea574b645218f41efc50517b7e54ddae40 100644
--- a/clang/lib/AST/Decl.cpp
+++ b/clang/lib/AST/Decl.cpp
@@ -3339,9 +3339,10 @@ void FunctionDecl::setParams(ASTContext &C,
 /// getMinRequiredArguments - Returns the minimum number of arguments
 /// needed to call this function. This may be fewer than the number of
 /// function parameters, if some of the parameters have default
-/// arguments (in C++) or are parameter packs (C++11).
-unsigned FunctionDecl::getMinRequiredArguments() const {
-  if (getASTContext().getLangOpts().BSC) {
+/// arguments (in C++) or are parameter packs (C++11) or contain "this"
+/// parameter (in BSC).
+unsigned FunctionDecl::getMinRequiredArguments(bool HasBSCScopeSpec) const {
+  if (getASTContext().getLangOpts().BSC && !HasBSCScopeSpec) {
     int num = getNumParams();
     if (num > 0 && parameters()[0] && parameters()[0]->IsThisParam) {
       num--;
diff --git a/clang/lib/Sema/SemaExpr.cpp b/clang/lib/Sema/SemaExpr.cpp
index 7d53cc7cdcce0f3c07deb6a6720c2fb8689135e0..d18a2f80c849aaa242cf4febc906bf45f5d40a92 100644
--- a/clang/lib/Sema/SemaExpr.cpp
+++ b/clang/lib/Sema/SemaExpr.cpp
@@ -5803,7 +5803,8 @@ Sema::ConvertArgumentsForCall(CallExpr *Call, Expr *Fn,
   // assignment, to the types of the corresponding parameter, ...
   unsigned NumParams = Proto->getNumParams();
   bool Invalid = false;
-  unsigned MinArgs = FDecl ? FDecl->getMinRequiredArguments() : NumParams;
+  unsigned MinArgs =
+      FDecl ? FDecl->getMinRequiredArguments(Fn->HasBSCScopeSpec) : NumParams;
   unsigned FnKind = Fn->getType()->isBlockPointerType()
                        ? 1 /* block */
                        : (IsExecConfig ? 3 /* kernel function (exec config) */
diff --git a/clang/test/BSC/Method/BuiltInType/int_too_few_arguments_call.cbs b/clang/test/BSC/Method/BuiltInType/int_too_few_arguments_call.cbs
new file mode 100644
index 0000000000000000000000000000000000000000..9a89f2e6fc0a611ac60e1533c04ce00d94119d8a
--- /dev/null
+++ b/clang/test/BSC/Method/BuiltInType/int_too_few_arguments_call.cbs
@@ -0,0 +1,9 @@
+// RUN: %clang_cc1 -verify %s
+
+void int::increase(int* this) { // expected-note {{'increase' declared here}}
+}
+
+int main() {
+    int::increase(); // expected-error {{too few arguments to function call, single argument 'this' was not specified}}
+    return 0;
+}
\ No newline at end of file