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diff --git a/gcc/testsuite/gfortran.dg/use_26.f90 b/gcc/testsuite/gfortran.dg/use_26.f90
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+! { dg-do compile }
+!
+! PR fortran/45836
+! The B_TYPE_INSTANCE%SIZERETURN() typebound function used to be rejected on a
+! type mismatch because the function was resolved to A's SIZERETURN instead of
+! B's because of the ambiguity of the SIZERETURN name in the MAIN namespace.
+!
+! Original testcase by someone <ortp21@gmail.com>
+
+module A
+implicit none
+    type :: a_type
+    private
+        integer :: size = 1
+    contains
+        procedure :: sizeReturn
+    end type a_type
+    contains
+        function sizeReturn( a_type_ )
+            implicit none
+            integer :: sizeReturn
+            class(a_type) :: a_type_
+
+            sizeReturn = a_type_%size
+        end function sizeReturn
+end module A
+
+module B
+implicit none
+    type :: b_type
+    private
+        integer :: size = 2
+    contains
+        procedure :: sizeReturn
+    end type b_type
+    contains
+        function sizeReturn( b_type_ )
+            implicit none
+            integer :: sizeReturn
+            class(b_type) :: b_type_
+
+            sizeReturn = b_type_%size
+        end function sizeReturn
+end module B
+
+program main
+
+  call test1
+  call test2
+
+contains
+
+  subroutine test1
+    use A
+    use B
+    implicit none
+    type(a_type) :: a_type_instance
+    type(b_type) :: b_type_instance
+
+    print *, a_type_instance%sizeReturn()
+    print *, b_type_instance%sizeReturn()
+  end subroutine test1
+
+  subroutine test2
+    use B
+    use A
+    implicit none
+    type(a_type) :: a_type_instance
+    type(b_type) :: b_type_instance
+
+    print *, a_type_instance%sizeReturn()
+    print *, b_type_instance%sizeReturn()
+  end subroutine test2
+end program main
+
+