diff --git a/pocketfft.cc b/pypocketfft.cc
similarity index 100%
rename from pocketfft.cc
rename to pypocketfft.cc
diff --git a/setup.py b/setup.py
index 9b06100898207d1a760fca46916404817da42935..fc3915e996196a3bfa07b77d83ecaf15e7e219a6 100644
--- a/setup.py
+++ b/setup.py
@@ -74,7 +74,7 @@ extra_cc_compile_args = extra_compile_args + extra_cc_compile_args
 def get_extension_modules():
     extension_modules = []
 
-    pocketfft_sources = ['pocketfft.cc']
+    pocketfft_sources = ['pypocketfft.cc']
     pocketfft_library = Extension('pypocketfft',
                                 sources=pocketfft_sources,
                                 include_dirs=include_dirs,