diff --git a/tests/topotests/lib/topotest.py b/tests/topotests/lib/topotest.py
index a8b3784b0f..2fed37f86e 100644
--- a/tests/topotests/lib/topotest.py
+++ b/tests/topotests/lib/topotest.py
@@ -160,7 +160,8 @@ class Router(Node):
             kernel_version = re.search(r'([0-9]+)\.([0-9]+).*', platform.release())
 
             if kernel_version:
-                if float(kernel_version.group(1)) < 4 and float(kernel.version.group(2)) < 5:
+                if float(kernel_version.group(1)) < 4 or
+                   (float(kernel_version.group(1)) == 4 and float(kernel.version.group(2)) < 5):
                     print("LDP Test need Linux Kernel 4.5 minimum")
                     return "LDP Test need Linux Kernel 4.5 minimum"
         # Add mpls modules to kernel if we use LDP