diff --git a/pyproject.toml b/pyproject.toml
index edae3061..3e9ecf9b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ count_commits_from_version_file = true
 enabled = true
 version_file = "src/mrpro/VERSION"
 template = "{tag}{env:MRPROVERSIONSUFFIX:''}"
-dev_template = "{tag}{env:MRPROVERSIONSUFFIX}"
+dev_template = "{tag}{env:MRPROVERSIONSUFFIX:''}"
 dirty_template = "{tag}+dirty{sha}"
 
 [tool.setuptools]