diff --git a/Headers/gnustep/base/NSClassDescription.h b/Headers/gnustep/base/NSClassDescription.h
index 2c6e011d4..c48454897 100644
--- a/Headers/gnustep/base/NSClassDescription.h
+++ b/Headers/gnustep/base/NSClassDescription.h
@@ -27,6 +27,8 @@
 #include <Foundation/NSObject.h>
 #include <Foundation/NSException.h>
 
+#ifndef	STRICT_OPENSTEP
+
 @class NSArray;
 @class NSDictionary;
 @class NSString;
@@ -59,3 +61,5 @@ GS_EXPORT NSString* const NSClassDescriptionNeededForClassNotification;
 
 #endif
 
+#endif
+
diff --git a/Headers/gnustep/base/NSKeyValueCoding.h b/Headers/gnustep/base/NSKeyValueCoding.h
index 74c21de09..6ae2ebec9 100644
--- a/Headers/gnustep/base/NSKeyValueCoding.h
+++ b/Headers/gnustep/base/NSKeyValueCoding.h
@@ -31,6 +31,7 @@
 @class NSDictionary;
 @class NSString;
 
+#ifndef	STRICT_OPENSTEP
 
 @interface NSObject (NSKeyValueCoding)
 
@@ -52,4 +53,5 @@
 @end
 
 #endif
+#endif