diff --git a/src/core/mod_fix.c b/src/core/mod_fix.c
index 325e3d117b4..925048d9405 100644
--- a/src/core/mod_fix.c
+++ b/src/core/mod_fix.c
@@ -801,6 +801,38 @@ int fixup_get_vstr_buf(sip_msg_t *msg, pv_elem_t *p, char *buf, int blen)
 	return -1;
 }
 
+/**
+ *
+ */
+int fixup_ssi(void** param, int param_no)
+{
+	switch(param_no) {
+		case 1:
+		case 2:
+			return fixup_spve_null(param, 1);
+		case 3:
+			return fixup_igp_null(param, 1);
+		default:
+			return E_UNSPEC;
+	}
+}
+
+/**
+ *
+ */
+int fixup_free_ssi(void** param, int param_no)
+{
+	switch(param_no) {
+		case 1:
+		case 2:
+			return fixup_free_spve_null(param, 1);
+		case 3:
+			return fixup_free_igp_null(param, 1);
+		default:
+			return E_UNSPEC;
+	}
+}
+
 /**
  *
  */
diff --git a/src/core/mod_fix.h b/src/core/mod_fix.h
index ca63a5a804d..8c2c766c1ef 100644
--- a/src/core/mod_fix.h
+++ b/src/core/mod_fix.h
@@ -163,6 +163,9 @@ int fixup_get_vstr_buf(sip_msg_t *msg, pv_elem_t *p, char *buf, int blen);
 int fixup_igp_regexp(void** param, int param_no);
 int fixup_free_igp_regexp(void** param, int param_no);
 
+int fixup_ssi(void** param, int param_no);
+int fixup_free_ssi(void** param, int param_no);
+
 int fixup_sssi(void** param, int param_no);
 int fixup_free_sssi(void** param, int param_no);