diff --git a/editor/base/nsEditRules.h b/editor/base/nsEditRules.h
index 55af338ef2ce..0279e977908d 100644
--- a/editor/base/nsEditRules.h
+++ b/editor/base/nsEditRules.h
@@ -24,8 +24,8 @@
 #define nsEditRules_h__
 
 #define NS_IEDITRULES_IID \
-{ /* a6cf911b-15b3-11d2-932e-00805f8add32 */ \
-0xa6cf911b, 0x15b3, 0x11d2, \
+{ /* a6cf911d-15b3-11d2-932e-00805f8add32 */ \
+0xa6cf911d, 0x15b3, 0x11d2, \
 {0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32} }
 
 class nsHTMLEditor;
diff --git a/editor/libeditor/base/nsEditRules.h b/editor/libeditor/base/nsEditRules.h
index 55af338ef2ce..0279e977908d 100644
--- a/editor/libeditor/base/nsEditRules.h
+++ b/editor/libeditor/base/nsEditRules.h
@@ -24,8 +24,8 @@
 #define nsEditRules_h__
 
 #define NS_IEDITRULES_IID \
-{ /* a6cf911b-15b3-11d2-932e-00805f8add32 */ \
-0xa6cf911b, 0x15b3, 0x11d2, \
+{ /* a6cf911d-15b3-11d2-932e-00805f8add32 */ \
+0xa6cf911d, 0x15b3, 0x11d2, \
 {0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32} }
 
 class nsHTMLEditor;