diff --git a/Headers/gnustep/base/Coding.h b/Headers/gnustep/base/Coding.h
index 52478bb1c..bc0fb8c91 100644
--- a/Headers/gnustep/base/Coding.h
+++ b/Headers/gnustep/base/Coding.h
@@ -32,6 +32,8 @@
 
 @protocol CommonCoding
 - (BOOL) isDecoding;
+- (void) closeCoder;
+- (BOOL) isClosed;
 + (int) defaultFormatVersion;
 @end
 
diff --git a/Source/objects/Coding.h b/Source/objects/Coding.h
index 52478bb1c..bc0fb8c91 100644
--- a/Source/objects/Coding.h
+++ b/Source/objects/Coding.h
@@ -32,6 +32,8 @@
 
 @protocol CommonCoding
 - (BOOL) isDecoding;
+- (void) closeCoder;
+- (BOOL) isClosed;
 + (int) defaultFormatVersion;
 @end