diff --git a/cmd/dep/godep_importer_test.go b/cmd/dep/godep_importer_test.go
index fdbcf099ce..c03fc9a13f 100644
--- a/cmd/dep/godep_importer_test.go
+++ b/cmd/dep/godep_importer_test.go
@@ -161,6 +161,47 @@ func TestGodepConfig_ConvertProject(t *testing.T) {
 	}
 }
 
+func TestGodepConfig_ConvertProject_WithSemverSuffix(t *testing.T) {
+	h := test.NewHelper(t)
+	defer h.Cleanup()
+
+	ctx := newTestContext(h)
+	sm, err := ctx.SourceManager()
+	h.Must(err)
+	defer sm.Release()
+
+	g := newGodepImporter(discardLogger, true, sm)
+	g.json = godepJSON{
+		Imports: []godepPackage{
+			{
+				ImportPath: "github.com/sdboyer/deptest",
+				Rev:        "ff2948a2ac8f538c4ecd55962e919d1e13e74baf",
+				Comment:    "v1.12.0-12-g2fd980e",
+			},
+		},
+	}
+
+	manifest, lock, err := g.convert("")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	d, ok := manifest.Constraints["github.com/sdboyer/deptest"]
+	if !ok {
+		t.Fatal("Expected the manifest to have a dependency for 'github.com/sdboyer/deptest' but got none")
+	}
+
+	v := d.Constraint.String()
+	if v != ">=1.12.0, <=12.0.0-g2fd980e" {
+		t.Fatalf("Expected manifest constraint to be >=1.12.0, <=12.0.0-g2fd980e, got %s", v)
+	}
+
+	p := lock.P[0]
+	if p.Ident().ProjectRoot != "github.com/sdboyer/deptest" {
+		t.Fatalf("Expected the lock to have a project for 'github.com/sdboyer/deptest' but got '%s'", p.Ident().ProjectRoot)
+	}
+}
+
 func TestGodepConfig_ConvertProject_EmptyComment(t *testing.T) {
 	h := test.NewHelper(t)
 	defer h.Cleanup()
diff --git a/internal/gps/source_manager.go b/internal/gps/source_manager.go
index 615cdb0cd0..4dc2695aad 100644
--- a/internal/gps/source_manager.go
+++ b/internal/gps/source_manager.go
@@ -498,9 +498,9 @@ func (sm *SourceMgr) DeduceProjectRoot(ip string) (ProjectRoot, error) {
 	return ProjectRoot(pd.root), err
 }
 
-// InferConstraint tries to puzzle out what kind of version is given in a string.
-// Preference is given first for revisions, then branches, then semver constraints,
-// and then plain tags.
+// InferConstraint tries to puzzle out what kind of version is given in a
+// string. Preference is given first for revisions, then branches, then semver
+// constraints, and then plain tags.
 func (sm *SourceMgr) InferConstraint(s string, pi ProjectIdentifier) (Constraint, error) {
 	slen := len(s)
 	if slen == 40 {
@@ -515,7 +515,7 @@ func (sm *SourceMgr) InferConstraint(s string, pi ProjectIdentifier) (Constraint
 	// Next, try for bzr, which has a three-component GUID separated by
 	// dashes. There should be two, but the email part could contain
 	// internal dashes
-	if strings.Count(s, "-") >= 2 {
+	if strings.Contains(s, "@") && strings.Count(s, "-") >= 2 {
 		// Work from the back to avoid potential confusion from the email
 		i3 := strings.LastIndex(s, "-")
 		// Skip if - is last char, otherwise this would panic on bounds err
diff --git a/internal/gps/source_manager_test.go b/internal/gps/source_manager_test.go
index bdd4709f3a..115985e73d 100644
--- a/internal/gps/source_manager_test.go
+++ b/internal/gps/source_manager_test.go
@@ -24,10 +24,16 @@ func TestSourceManager_InferConstraint(t *testing.T) {
 		t.Fatal(err)
 	}
 
+	svs, err := NewSemverConstraintIC("v0.12.0-12-de4dcafe0")
+	if err != nil {
+		t.Fatal(err)
+	}
+
 	constraints := map[string]Constraint{
 		"v0.8.1": sv,
 		"v2":     NewBranch("v2"),
-		"master": NewBranch("master"),
+		"v0.12.0-12-de4dcafe0": svs,
+		"master":               NewBranch("master"),
 		"5b3352dc16517996fb951394bcbbe913a2a616e3": Revision("5b3352dc16517996fb951394bcbbe913a2a616e3"),
 
 		// valid bzr rev