diff --git a/headers/tools/cppunit/TestShell.h b/headers/tools/cppunit/TestShell.h
index a616fd20d0..c815e8971f 100644
--- a/headers/tools/cppunit/TestShell.h
+++ b/headers/tools/cppunit/TestShell.h
@@ -13,6 +13,7 @@
 #include <string>
 
 class BDirectory;
+class BPath;
 
 // Defines SuiteFunction to be a pointer to a function that
 // takes no arguments and returns a pointer to a CppUnit::Test