diff --git a/xpcom/macbuild/XPCOMIDL.xml b/xpcom/macbuild/XPCOMIDL.xml
index 28d480d8f893..868bbd050d61 100644
--- a/xpcom/macbuild/XPCOMIDL.xml
+++ b/xpcom/macbuild/XPCOMIDL.xml
@@ -955,6 +955,13 @@
                     <FILEKIND>Text</FILEKIND>
                     <FILEFLAGS></FILEFLAGS>
                 </FILE>
+                <FILE>
+                    <PATHTYPE>Name</PATHTYPE>
+                    <PATH>nsITimerManager.idl</PATH>
+                    <PATHFORMAT>MacOS</PATHFORMAT>
+                    <FILEKIND>Text</FILEKIND>
+                    <FILEFLAGS></FILEFLAGS>
+                </FILE>
                 <FILE>
                     <PATHTYPE>Name</PATHTYPE>
                     <PATH>nsIScriptableTimer.idl</PATH>
@@ -1439,6 +1446,11 @@
                     <PATH>nsIThreadPool.idl</PATH>
                     <PATHFORMAT>MacOS</PATHFORMAT>
                 </FILEREF>
+                <FILEREF>
+                    <PATHTYPE>Name</PATHTYPE>
+                    <PATH>nsITimerManager.idl</PATH>
+                    <PATHFORMAT>MacOS</PATHFORMAT>
+                </FILEREF>
                 <FILEREF>
                     <PATHTYPE>Name</PATHTYPE>
                     <PATH>nsIScriptableTimer.idl</PATH>
@@ -2598,6 +2610,13 @@
                     <FILEKIND>Text</FILEKIND>
                     <FILEFLAGS></FILEFLAGS>
                 </FILE>
+                <FILE>
+                    <PATHTYPE>Name</PATHTYPE>
+                    <PATH>nsITimerManager.idl</PATH>
+                    <PATHFORMAT>MacOS</PATHFORMAT>
+                    <FILEKIND>Text</FILEKIND>
+                    <FILEFLAGS></FILEFLAGS>
+                </FILE>
                 <FILE>
                     <PATHTYPE>Name</PATHTYPE>
                     <PATH>nsIScriptableTimer.idl</PATH>
@@ -3082,6 +3101,11 @@
                     <PATH>nsIThreadPool.idl</PATH>
                     <PATHFORMAT>MacOS</PATHFORMAT>
                 </FILEREF>
+                <FILEREF>
+                    <PATHTYPE>Name</PATHTYPE>
+                    <PATH>nsITimerManager.idl</PATH>
+                    <PATHFORMAT>MacOS</PATHFORMAT>
+                </FILEREF>
                 <FILEREF>
                     <PATHTYPE>Name</PATHTYPE>
                     <PATH>nsIScriptableTimer.idl</PATH>
@@ -3671,6 +3695,12 @@
             <PATH>nsIThreadPool.idl</PATH>
             <PATHFORMAT>MacOS</PATHFORMAT>
         </FILEREF>
+        <FILEREF>
+            <TARGETNAME>headers</TARGETNAME>
+            <PATHTYPE>Name</PATHTYPE>
+            <PATH>nsITimerManager.idl</PATH>
+            <PATHFORMAT>MacOS</PATHFORMAT>
+        </FILEREF>
         <FILEREF>
             <TARGETNAME>headers</TARGETNAME>
             <PATHTYPE>Name</PATHTYPE>