diff --git a/src/sdr/__init__.py b/src/sdr/__init__.py
index 4bc683b60..d69299cfe 100644
--- a/src/sdr/__init__.py
+++ b/src/sdr/__init__.py
@@ -14,4 +14,4 @@
     )
 
 from ._farrow import FarrowResampler
-from ._iir import IIR
+from ._iir_filter import IIR
diff --git a/src/sdr/_iir.py b/src/sdr/_iir_filter.py
similarity index 100%
rename from src/sdr/_iir.py
rename to src/sdr/_iir_filter.py