diff --git a/libs/freetdm/src/ozmod/ozmod_sangoma_boost/ozmod_sangoma_boost.c b/libs/freetdm/src/ozmod/ozmod_sangoma_boost/ozmod_sangoma_boost.c
index 7555ad329c..5090ca7197 100644
--- a/libs/freetdm/src/ozmod/ozmod_sangoma_boost/ozmod_sangoma_boost.c
+++ b/libs/freetdm/src/ozmod/ozmod_sangoma_boost/ozmod_sangoma_boost.c
@@ -1653,7 +1653,7 @@ static ZIO_SIG_CONFIGURE_FUNCTION(zap_sangoma_boost_configure_span)
 
 			FAIL_CONFIG_RETURN(ZAP_FAIL);
 		}
-		if (!(sigmod_iface = (boost_sigmod_interface_t *)zap_dso_func_sym(lib, "boost_sigmod_interface", &err))) {
+		if (!(sigmod_iface = (boost_sigmod_interface_t *)zap_dso_func_sym(lib, BOOST_INTERFACE_NAME, &err))) {
 			zap_log(ZAP_LOG_ERROR, "Failed to read Sangoma boost signaling module interface '%s': %s\n", path, err);
 			snprintf(span->last_error, sizeof(span->last_error), "Failed to read Sangoma boost signaling module interface '%s': %s", path, err);
 
diff --git a/libs/freetdm/src/ozmod/ozmod_sangoma_boost/sangoma_boost_sigmod.h b/libs/freetdm/src/ozmod/ozmod_sangoma_boost/sangoma_boost_sigmod.h
index 89bec2dce6..8b09b25261 100644
--- a/libs/freetdm/src/ozmod/ozmod_sangoma_boost/sangoma_boost_sigmod.h
+++ b/libs/freetdm/src/ozmod/ozmod_sangoma_boost/sangoma_boost_sigmod.h
@@ -169,6 +169,9 @@ typedef struct boost_sigmod_interface_s {
 	void *pvt;
 } boost_sigmod_interface_t;
 
+#define BOOST_INTERFACE_NAME "boost_sigmod_interface"
+/* use this in your sig boost module to declare your interface */
+#define BOOST_INTERFACE boost_sigmod_interface_t BOOST_INTERFACE_NAME
 #endif
 
 /* For Emacs: