diff --git a/boot-qemu.py b/boot-qemu.py
index e8ce4a2..e3cbc04 100755
--- a/boot-qemu.py
+++ b/boot-qemu.py
@@ -327,7 +327,7 @@ def get_linux_ver_code(decomp_cmd):
 
     linux_version = None
     for line in strings.stdout.decode("UTF-8").split("\n"):
-        if re.search(r"Linux version \d\.\d+\.\d+", line):
+        if re.search(r"Linux version \d+\.\d+\.\d+", line):
             # "Linux version x.y.z-<localversion> ..." -> "x.y.z-<localversion>" -> "x.y.z" -> ['x', 'y', 'z']
             linux_version = line.split(" ")[2].split("-")[0].split(".")
             break