diff --git a/container/docker/factory.go b/container/docker/factory.go
index 8b95937c794..97e9623367a 100644
--- a/container/docker/factory.go
+++ b/container/docker/factory.go
@@ -227,7 +227,7 @@ func ensureThinLsKernelVersion(kernelVersion string) error {
 	}
 
 	// Certain RHEL/Centos 7.x kernels have a backport to fix the corruption bug
-	if !strings.Contains(kernelVersion, ".el7.") {
+	if !strings.Contains(kernelVersion, ".el7") {
 		// not a RHEL 7.x kernel - won't work
 		return fmt.Errorf("kernel version 4.4.0 or later is required to use thin_ls - you have %q", kernelVersion)
 	}
diff --git a/container/docker/factory_test.go b/container/docker/factory_test.go
index 6b310c117cf..2bb10837e72 100644
--- a/container/docker/factory_test.go
+++ b/container/docker/factory_test.go
@@ -26,6 +26,7 @@ func TestEnsureThinLsKernelVersion(t *testing.T) {
 		{"4.6.4-301.fc24.x86_64", ""},
 		{"3.10.0-327.22.2.el7.x86_64", `RHEL/Centos 7.x kernel version 3.10.0-366 or later is required to use thin_ls - you have "3.10.0-327.22.2.el7.x86_64"`},
 		{"3.10.0-366.el7.x86_64", ""},
+		{"3.10.0-366.el7_3.x86_64", ""},
 		{"3.10.0.el7.abc", `unable to determine RHEL/Centos 7.x kernel release from "3.10.0.el7.abc"`},
 		{"3.10.0-abc.el7.blarg", `error parsing release "abc": strconv.ParseInt: parsing "abc": invalid syntax`},
 		{"3.10.0-367.el7.x86_64", ""},