diff --git a/libs/freetdm/src/ozmod/ozmod_sangoma_boost/sangoma_boost_interface.h b/libs/freetdm/src/ozmod/ozmod_sangoma_boost/sangoma_boost_interface.h
index 8b09b25261..63f8194f1b 100644
--- a/libs/freetdm/src/ozmod/ozmod_sangoma_boost/sangoma_boost_interface.h
+++ b/libs/freetdm/src/ozmod/ozmod_sangoma_boost/sangoma_boost_interface.h
@@ -32,8 +32,8 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef SANGOMA_BOOST_SIGMOD_H
-#define SANGOMA_BOOST_SIGMOD_H
+#ifndef SANGOMA_BOOST_INTERFACE_H
+#define SANGOMA_BOOST_INTERFACE_H
 
 #include "zap_types.h"