diff --git a/slpkg/sbo/build_num.py b/slpkg/sbo/build_num.py
index 94ba9fc5..07d6fb4b 100644
--- a/slpkg/sbo/build_num.py
+++ b/slpkg/sbo/build_num.py
@@ -42,7 +42,8 @@ class BuildNumber(Utils):
         if self.sbo_url:
             SlackBuild = URL(f"{self.sbo_url}{self.pkg}.SlackBuild").reading()
         else:
-            SlackBuild = self.read_file(f"{self.meta.build_path}{self.pkg}/{self.pkg}.SlackBuild")
+            SlackBuild = self.read_file(f"{self.meta.build_path}{self.pkg}/"
+                                        f"{self.pkg}.SlackBuild")
         for line in SlackBuild.splitlines():
             line = line.lstrip()
             if line.startswith("BUILD="):