diff --git a/CHANGES/250.bugfix b/CHANGES/250.bugfix
new file mode 100644
index 00000000..beaeafbe
--- /dev/null
+++ b/CHANGES/250.bugfix
@@ -0,0 +1 @@
+Do not install C sources with binary distributions.
diff --git a/setup.py b/setup.py
index 90876d99..bbf3620c 100644
--- a/setup.py
+++ b/setup.py
@@ -87,4 +87,5 @@ def read(f):
     python_requires='>=3.6',
     install_requires=install_requires,
     include_package_data=True,
+    exclude_package_data={"": ["*.c"]},
 )