diff --git a/Tests/RunCMake/DependencyGraph/mylib.f90 b/Tests/RunCMake/DependencyGraph/mylib.f90
index 104768f89e..d3fac72974 100644
--- a/Tests/RunCMake/DependencyGraph/mylib.f90
+++ b/Tests/RunCMake/DependencyGraph/mylib.f90
@@ -1,3 +1,4 @@
 function mylib_fortran()
+  integer :: mylib_fortran
   mylib_fortran = 42
 end function mylib_fortran