diff --git a/modules/rostests/apitests/kernel32/MultiByteToWideChar.c b/modules/rostests/apitests/kernel32/MultiByteToWideChar.c
index 0cb6e2215b0..82e4dc6bc16 100644
--- a/modules/rostests/apitests/kernel32/MultiByteToWideChar.c
+++ b/modules/rostests/apitests/kernel32/MultiByteToWideChar.c
@@ -189,6 +189,7 @@ static OSVERSIONINFOW *GetRealOSVersion()
                 return &osvi;
             }
         }
+        FreeLibrary(hNTDLL);
     }
     return NULL;
 }