diff --git a/mozilla/mailnews/base/src/Makefile.in b/mozilla/mailnews/base/src/Makefile.in
index ad4d7cf350d..60f5f9d4b83 100644
--- a/mozilla/mailnews/base/src/Makefile.in
+++ b/mozilla/mailnews/base/src/Makefile.in
@@ -50,6 +50,7 @@ CPPSRCS = \
 	nsLocalFolderSummarySpec.cpp	\
 	nsMsgMD5.cpp \
 	nsUrlListenerManager.cpp \
+	nsUInt32Array.cpp	\
 	$(NULL)
 
 CPPSRCS += \