diff --git a/apier/v1/filters_it_test.go b/apier/v1/filters_it_test.go
index cd3caa002..ee32323e5 100644
--- a/apier/v1/filters_it_test.go
+++ b/apier/v1/filters_it_test.go
@@ -168,7 +168,7 @@ func testFilterUpdateFilter(t *testing.T) {
 			Values:    []string{"1001", "1002"},
 		},
 		&engine.RequestFilter{
-			FieldName: "*string_prefix",
+			FieldName: "*stringprefix",
 			Type:      "Destination",
 			Values:    []string{"10", "20"},
 		},
diff --git a/apier/v1/tpfilters_it_test.go b/apier/v1/tpfilters_it_test.go
index 7782acaba..2ff36beb4 100644
--- a/apier/v1/tpfilters_it_test.go
+++ b/apier/v1/tpfilters_it_test.go
@@ -179,7 +179,7 @@ func testTPFilterUpdateTPFilter(t *testing.T) {
 			Values:    []string{"1001", "1002"},
 		},
 		&utils.TPFilter{
-			Type:      "*string_prefix",
+			Type:      "*stringprefix",
 			FieldName: "Destination",
 			Values:    []string{"10", "20"},
 		},
diff --git a/data/tariffplans/testtp/Filters.csv b/data/tariffplans/testtp/Filters.csv
index 4a71dee40..38dc68ba3 100644
--- a/data/tariffplans/testtp/Filters.csv
+++ b/data/tariffplans/testtp/Filters.csv
@@ -1,6 +1,6 @@
 #Tenant[0],ID[1],FilterType[2],FilterFieldName[3],FilterFieldValues[4],ActivationInterval[5]
 cgrates.org,FLTR_1,*string,Account,1001;1002,2014-07-29T15:00:00Z
-cgrates.org,FLTR_1,*string_prefix,Destination,10;20,
+cgrates.org,FLTR_1,*stringprefix,Destination,10;20,
 cgrates.org,FLTR_1,*rsr,,Subject(~^1.*1$);Destination(1002),
 cgrates.org,FLTR_ACNT_1007,*string,Account,1007,2014-07-29T15:00:00Z
 cgrates.org,FLTR_ACNT_dan,*string,Account,dan,2014-07-29T15:00:00Z
diff --git a/data/tariffplans/tutorial/Filters.csv b/data/tariffplans/tutorial/Filters.csv
index 5bdc0634f..f048deec2 100644
--- a/data/tariffplans/tutorial/Filters.csv
+++ b/data/tariffplans/tutorial/Filters.csv
@@ -1,6 +1,6 @@
 #Tenant[0],ID[1],FilterType[2],FilterFieldName[3],FilterFieldValues[4],ActivationInterval[5]
 cgrates.org,FLTR_1,*string,Account,1001;1002,2014-07-29T15:00:00Z
-cgrates.org,FLTR_1,*string_prefix,Destination,10;20,
+cgrates.org,FLTR_1,*stringprefix,Destination,10;20,
 cgrates.org,FLTR_1,*rsr,,Subject(~^1.*1$);Destination(1002),
 cgrates.org,FLTR_ACNT_1007,*string,Account,1007,2014-07-29T15:00:00Z
 cgrates.org,FLTR_ACNT_dan,*string,Account,dan,2014-07-29T15:00:00Z
diff --git a/engine/filters.go b/engine/filters.go
index d8a468031..ba553d3f8 100644
--- a/engine/filters.go
+++ b/engine/filters.go
@@ -31,7 +31,7 @@ import (
 
 const (
 	MetaString         = "*string"
-	MetaStringPrefix   = "*string_prefix"
+	MetaStringPrefix   = "*stringprefix"
 	MetaTimings        = "*timings"
 	MetaRSR            = "*rsr"
 	MetaStatS          = "*stats"
diff --git a/engine/filters_test.go b/engine/filters_test.go
index 6811618b0..1ff1270ff 100644
--- a/engine/filters_test.go
+++ b/engine/filters_test.go
@@ -307,13 +307,13 @@ func TestInlineFilterPassFiltersForEvent(t *testing.T) {
 		"Account": "1007",
 	}
 	if pass, err := filterS.PassFiltersForEvent("cgrates.org",
-		failEvent, []string{"*string_prefix:Account:10"}); err != nil {
+		failEvent, []string{"*stringprefix:Account:10"}); err != nil {
 		t.Errorf(err.Error())
 	} else if pass {
 		t.Errorf("Expecting: %+v, received: %+v", false, pass)
 	}
 	if pass, err := filterS.PassFiltersForEvent("cgrates.org",
-		passEvent, []string{"*string_prefix:Account:10"}); err != nil {
+		passEvent, []string{"*stringprefix:Account:10"}); err != nil {
 		t.Errorf(err.Error())
 	} else if !pass {
 		t.Errorf("Expecting: %+v, received: %+v", true, pass)
diff --git a/engine/loader_csv_test.go b/engine/loader_csv_test.go
index e3ddee8d5..4f7738d8d 100755
--- a/engine/loader_csv_test.go
+++ b/engine/loader_csv_test.go
@@ -284,7 +284,7 @@ cgrates.org,Threshold1,FLTR_1;FLTR_ACNT_dan,2014-07-29T15:00:00Z,true,10,1s,true
 	filters = `
 #Tenant[0],ID[1],FilterType[2],FilterFieldName[3],FilterFieldValues[4],ActivationInterval[5]
 cgrates.org,FLTR_1,*string,Account,1001;1002,2014-07-29T15:00:00Z
-cgrates.org,FLTR_1,*string_prefix,Destination,10;20,2014-07-29T15:00:00Z
+cgrates.org,FLTR_1,*stringprefix,Destination,10;20,2014-07-29T15:00:00Z
 cgrates.org,FLTR_1,*rsr,,Subject(~^1.*1$);Destination(1002),
 cgrates.org,FLTR_ACNT_dan,*string,Account,dan,2014-07-29T15:00:00Z
 cgrates.org,FLTR_DST_DE,*destinations,Destination,DST_DE,2014-07-29T15:00:00Z
@@ -1564,7 +1564,7 @@ func TestLoadFilters(t *testing.T) {
 				},
 				&utils.TPFilter{
 					FieldName: "Destination",
-					Type:      "*string_prefix",
+					Type:      "*stringprefix",
 					Values:    []string{"10", "20"},
 				},
 				&utils.TPFilter{