diff --git a/featurebranch.go b/featurebranch.go
index 94e07b8..2bd339d 100644
--- a/featurebranch.go
+++ b/featurebranch.go
@@ -3,7 +3,7 @@ package gitcommithook
 import "regexp"
 
 var patterns = []string{
-	`(?m)(?:\s|^|/)([A-Z]+-[0-9]+)([\s,;:!.-]|$)`,
+	`(?m)(?:\s|^|/)(([A-Z](_)*)+-[0-9]+)([\s,;:!.-]|$)`,
 }
 
 //IsFeatureBranch detects weatcher the input matches one of the defined patterns
diff --git a/featurebranch_test.go b/featurebranch_test.go
index be7647e..572ed23 100644
--- a/featurebranch_test.go
+++ b/featurebranch_test.go
@@ -14,6 +14,7 @@ func TestIsFeatureBranch_Positive(t *testing.T) {
 	}{
 		{"TOOL-1242", true},
 		{"feature/TOOL-1242", true},
+		{"feature/PROJECT_XYZ-2938", true},
 	}
 
 	for _, test := range testData {