diff --git a/ChangeLog b/ChangeLog
index c57f56214..190efa6be 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2021-06-08  Werner Lemberg  <wl@gnu.org>
+
+	* src/sdf/ftsdfcommon.c: Fix inclusion of header files.
+
 2021-06-08  Werner Lemberg  <wl@gnu.org>
 
 	[sdf] Make `make multi` work.
diff --git a/src/sdf/ftsdfcommon.c b/src/sdf/ftsdfcommon.c
index 031f2bab8..91aa521bb 100644
--- a/src/sdf/ftsdfcommon.c
+++ b/src/sdf/ftsdfcommon.c
@@ -18,8 +18,8 @@
  */
 
 
-#include <ftsdf.h>
-#include <ftsdfcommon.h>
+#include "ftsdf.h"
+#include "ftsdfcommon.h"
 
 
   /**************************************************************************