diff --git a/src/signal-base-py.cc b/src/signal-base-py.cc
index b400896eea08b3ab0fc4f0cdf45f0e08a14b76de..f02ed1ee06089803dfc410942d21de2ac0f1468f 100644
--- a/src/signal-base-py.cc
+++ b/src/signal-base-py.cc
@@ -19,6 +19,7 @@
 
 #include <dynamic-graph/signal-base.h>
 #include <dynamic-graph/signal.h>
+#include <dynamic-graph/signal-ptr.h>
 #include <dynamic-graph/signal-caster.h>
 #include <dynamic-graph/linear-algebra.h>