diff --git a/master.cfg b/master.cfg
index 3e243dc..aa489f4 100644
--- a/master.cfg
+++ b/master.cfg
@@ -1151,7 +1151,7 @@ class RunTestGDBNetBSD_Common (BuildAndTestGDBFactory):
         self.enable_targets_all = False
         BuildAndTestGDBFactory.__init__ (self, **kwargs)
 
-class RunTestGDBPlainNetBSD_c64 (RunTestGDBPlain_c64t64, RunTestGDBNetBSD_Common):
+class RunTestGDBPlainNetBSD_c64 (RunTestGDBNetBSD_Common):
     """Compiling (but not testing) for 64-bit"""
     pass