diff --git a/content/events/src/Makefile.in b/content/events/src/Makefile.in
index 8d5fdf07dce..fe48d84559c 100644
--- a/content/events/src/Makefile.in
+++ b/content/events/src/Makefile.in
@@ -57,5 +57,5 @@ include $(topsrcdir)/config/rules.mk
 
 DEFINES		+= -D_IMPL_NS_HTML
 
-INCLUDES	+= -I$(srcdir)/../../html/base/src
+INCLUDES	+= -I$(srcdir)/../../html/base/src -I$(srcdir)/../../xul/content/src
 
diff --git a/layout/events/src/Makefile.in b/layout/events/src/Makefile.in
index 8d5fdf07dce..fe48d84559c 100644
--- a/layout/events/src/Makefile.in
+++ b/layout/events/src/Makefile.in
@@ -57,5 +57,5 @@ include $(topsrcdir)/config/rules.mk
 
 DEFINES		+= -D_IMPL_NS_HTML
 
-INCLUDES	+= -I$(srcdir)/../../html/base/src
+INCLUDES	+= -I$(srcdir)/../../html/base/src -I$(srcdir)/../../xul/content/src