diff --git a/src/modules/textopsx/doc/functions.xml b/src/modules/textopsx/doc/functions.xml
index b43a0d4bb87..e1efc9efa65 100644
--- a/src/modules/textopsx/doc/functions.xml
+++ b/src/modules/textopsx/doc/functions.xml
@@ -618,6 +618,35 @@ hf_iterator_end("i1");
     }
     hf_iterator_end("i1");
 ...
+</programlisting>
+		</example>
+	</section>
+	<section id="textopsx.f.hf_iterator_insert">
+		<title>
+		<function moreinfo="none">hf_iterator_insert(iname, htext)</function>
+		</title>
+		<para>
+			Add headers before the one at the current iterator possition.
+		</para>
+		<para>
+			The parameters can be dynamic strings with variables.
+		</para>
+		<para>
+			This function can be used from ANY_ROUTE.
+		</para>
+		<example>
+		<title><function>hf_iterator_insert</function> usage</title>
+		<programlisting format="linespecific">
+...
+    hf_iterator_start("i1");
+    while(hf_iterator_next("i1")) {
+        if($hfitname(i1)=="My-Header") {
+            hf_iterator_insert("i1", "My-New-Header: abc\r\n");
+            break;
+        }
+    }
+    hf_iterator_end("i1");
+...
 </programlisting>
 		</example>
 	</section>
diff --git a/src/modules/textopsx/textopsx.c b/src/modules/textopsx/textopsx.c
index 297ff1098ed..b9f8c0af14c 100644
--- a/src/modules/textopsx/textopsx.c
+++ b/src/modules/textopsx/textopsx.c
@@ -78,6 +78,7 @@ static int w_hf_iterator_next(sip_msg_t *msg, char *piname, char *p2);
 static int w_hf_iterator_end(sip_msg_t *msg, char *piname, char *p2);
 static int w_hf_iterator_rm(sip_msg_t *msg, char *piname, char *p2);
 static int w_hf_iterator_append(sip_msg_t *msg, char *piname, char *phtext);
+static int w_hf_iterator_insert(sip_msg_t *msg, char *piname, char *phtext);
 
 static int bind_textopsx(textopsx_api_t *tob);
 
@@ -142,6 +143,8 @@ static cmd_export_t cmds[] = {
 			fixup_free_spve_null, ANY_ROUTE},
 	{"hf_iterator_append", w_hf_iterator_append, 2, fixup_spve_spve,
 			fixup_free_spve_spve, ANY_ROUTE},
+	{"hf_iterator_insert", w_hf_iterator_insert, 2, fixup_spve_spve,
+			fixup_free_spve_spve, ANY_ROUTE},
 
 	{"bind_textopsx", (cmd_function)bind_textopsx, 1, 0, 0, ANY_ROUTE},
 
@@ -2117,6 +2120,62 @@ static int w_hf_iterator_append(sip_msg_t *msg, char *piname, char *phtext)
 	return ki_hf_iterator_append(msg, &iname, &htext);
 }
 
+/**
+ *
+ */
+static int ki_hf_iterator_insert(sip_msg_t *msg, str *iname, str *htext)
+{
+	int k;
+	sr_lump_t *anchor;
+	str sval = STR_NULL;
+
+	k = ki_hf_iterator_index(msg, iname);
+	if(k<0 || _hf_iterators[k].it==NULL) {
+		return -1;
+	}
+	anchor = anchor_lump(msg, _hf_iterators[k].it->name.s - msg->buf, 0, 0);
+	if (anchor==0) {
+		LM_ERR("cannot insert hdr after %.*s\n", _hf_iterators[k].it->name.len,
+				_hf_iterators[k].it->name.s);
+		return -1;
+	}
+	sval.s = (char*)pkg_malloc(htext->len + 1);
+	if(sval.s==NULL) {
+		LM_ERR("failed to insert hdr after %.*s\n", _hf_iterators[k].it->name.len,
+				_hf_iterators[k].it->name.s);
+		return -1;
+	}
+	memcpy(sval.s, htext->s, htext->len);
+	sval.len = htext->len;
+	sval.s[sval.len] = '\0';
+
+	if (insert_new_lump_before(anchor, sval.s, sval.len, 0) == 0) {
+		LM_ERR("cannot insert lump\n");
+		pkg_free(sval.s);
+		return -1;
+	}
+	return 1;
+}
+
+/**
+ *
+ */
+static int w_hf_iterator_insert(sip_msg_t *msg, char *piname, char *phtext)
+{
+	str iname = STR_NULL;
+	str htext = STR_NULL;
+	if(fixup_get_svalue(msg, (gparam_t*)piname, &iname)<0) {
+		LM_ERR("failed to get iterator name\n");
+		return -1;
+	}
+	if(fixup_get_svalue(msg, (gparam_t*)phtext, &htext)<0) {
+		LM_ERR("failed to get header text\n");
+		return -1;
+	}
+
+	return ki_hf_iterator_insert(msg, &iname, &htext);
+}
+
 /**
  *
  */
@@ -2735,6 +2794,16 @@ static sr_kemi_t sr_kemi_textopsx_exports[] = {
 		{ SR_KEMIP_STR, SR_KEMIP_NONE, SR_KEMIP_NONE,
 			SR_KEMIP_NONE, SR_KEMIP_NONE, SR_KEMIP_NONE }
 	},
+	{ str_init("textopsx"), str_init("hf_iterator_append"),
+		SR_KEMIP_INT, ki_hf_iterator_append,
+		{ SR_KEMIP_STR, SR_KEMIP_STR, SR_KEMIP_NONE,
+			SR_KEMIP_NONE, SR_KEMIP_NONE, SR_KEMIP_NONE }
+	},
+	{ str_init("textopsx"), str_init("hf_iterator_insert"),
+		SR_KEMIP_INT, ki_hf_iterator_insert,
+		{ SR_KEMIP_STR, SR_KEMIP_STR, SR_KEMIP_NONE,
+			SR_KEMIP_NONE, SR_KEMIP_NONE, SR_KEMIP_NONE }
+	},
 
 	{ {0, 0}, {0, 0}, 0, NULL, { 0, 0, 0, 0, 0, 0 } }
 };