diff --git a/Headers/gnustep/base/Lock.h b/Headers/gnustep/base/Lock.h
index 7a3cd2b92..df4390dd9 100644
--- a/Headers/gnustep/base/Lock.h
+++ b/Headers/gnustep/base/Lock.h
@@ -27,7 +27,7 @@
 #include <objects/stdobjects.h>
 #include <objects/Locking.h>
 
-@interface Lock : Object <Locking>
+@interface Lock : NSObject <Locking>
 {
 }
 @end
diff --git a/Source/objects/Lock.h b/Source/objects/Lock.h
index 7a3cd2b92..df4390dd9 100644
--- a/Source/objects/Lock.h
+++ b/Source/objects/Lock.h
@@ -27,7 +27,7 @@
 #include <objects/stdobjects.h>
 #include <objects/Locking.h>
 
-@interface Lock : Object <Locking>
+@interface Lock : NSObject <Locking>
 {
 }
 @end