diff --git a/recipes/pyprojecttoolchain/all/conanfile.py b/recipes/pyprojecttoolchain/all/conanfile.py
index 2dfc4cf..a99e197 100644
--- a/recipes/pyprojecttoolchain/all/conanfile.py
+++ b/recipes/pyprojecttoolchain/all/conanfile.py
@@ -55,7 +55,7 @@ def context(self):
 
         mod_version = Version(self._conanfile.version)
         pypi_version = f"{mod_version.major}.{mod_version.minor}.{mod_version.patch}"
-        if mod_version.pre != "":
+        if mod_version.pre is not None:
             split_prerelease = str(mod_version.pre).split(".")
             if len(split_prerelease) > 1:
                 pypi_version += f"{split_prerelease[0][0]}{split_prerelease[1]}"