diff --git a/ChangeLog b/ChangeLog
index eb5c617cd..2ee336b32 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2013-01-25  Werner Lemberg  <wl@gnu.org>
+
+	Fix `make multi'
+
+	* src/base/ftoutln.c, src/base/fttrigon.c: Include
+	FT_INTERNAL_CALC_H.
+
 2013-01-25  David 'Digit' Turner  <digit@google.com>
 
 	[truetype] Fix C++ compilation.
diff --git a/src/base/ftoutln.c b/src/base/ftoutln.c
index 76d3b7f1f..72d3c5a1c 100644
--- a/src/base/ftoutln.c
+++ b/src/base/ftoutln.c
@@ -26,6 +26,7 @@
 #include <ft2build.h>
 #include FT_OUTLINE_H
 #include FT_INTERNAL_OBJECTS_H
+#include FT_INTERNAL_CALC_H
 #include FT_INTERNAL_DEBUG_H
 #include FT_TRIGONOMETRY_H
 
diff --git a/src/base/fttrigon.c b/src/base/fttrigon.c
index e8cc3e3a7..4df6166af 100644
--- a/src/base/fttrigon.c
+++ b/src/base/fttrigon.c
@@ -31,6 +31,7 @@
 
 #include <ft2build.h>
 #include FT_INTERNAL_OBJECTS_H
+#include FT_INTERNAL_CALC_H
 #include FT_TRIGONOMETRY_H