diff --git a/layout/html/base/src/Makefile.in b/layout/html/base/src/Makefile.in
index c261a6ac0e08..1ade917a1df2 100644
--- a/layout/html/base/src/Makefile.in
+++ b/layout/html/base/src/Makefile.in
@@ -34,6 +34,7 @@ CPPSRCS=				\
 	nsBlockReflowContext.cpp	\
 	nsBulletFrame.cpp		\
 	nsContainerFrame.cpp		\
+	nsDST.cpp			\
 	nsFirstLetterFrame.cpp		\
 	nsFrame.cpp			\
 	nsHRFrame.cpp			\