diff --git a/news/1800.bugfix.md b/news/1800.bugfix.md
new file mode 100644
index 0000000000..a38723ff0f
--- /dev/null
+++ b/news/1800.bugfix.md
@@ -0,0 +1 @@
+Avoid duplicate .pdm-python in .gitignore.
\ No newline at end of file
diff --git a/src/pdm/cli/commands/fix/fixers.py b/src/pdm/cli/commands/fix/fixers.py
index c09cdf8d84..8c635e7f6f 100644
--- a/src/pdm/cli/commands/fix/fixers.py
+++ b/src/pdm/cli/commands/fix/fixers.py
@@ -48,8 +48,9 @@ def _fix_gitignore(self) -> None:
         if not gitignore.exists():
             return
         content = gitignore.read_text("utf8")
-        content = re.sub(r"^\.pdm\.toml$", ".pdm-python", content, flags=re.M)
-        gitignore.write_text(content, "utf8")
+        if ".pdm-python" not in content:
+            content = re.sub(r"^\.pdm\.toml$", ".pdm-python", content, flags=re.M)
+            gitignore.write_text(content, "utf8")
 
     def fix(self) -> None:
         old_file = self.project.root.joinpath(".pdm.toml")