release: 1.3.18

[lilypond.git] / lily / beam.cc

diff --git a/lily/beam.cc b/lily/beam.cc
index 51752dc3f7d4a651a24940bb6e85c21f7e2ae1e4..1daf73682b395abf745300f592038973e4ba448c 100644 (file)
--- a/lily/beam.cc
+++ b/lily/beam.cc
@@ -14,6 +14,8 @@
     * move paper vars to scm
 
 */
+#include <math.h>              // tanh.
+
 #include "directional-element-interface.hh"
 #include "beaming.hh"
 #include "dimensions.hh"