diff --git a/ecp5/bitstream.cc b/ecp5/bitstream.cc
index 95256732..1c150ae2 100644
--- a/ecp5/bitstream.cc
+++ b/ecp5/bitstream.cc
@@ -26,7 +26,7 @@
 #include <streambuf>
 
 #include "config.h"
-#include "io.h"
+#include "pio.h"
 #include "log.h"
 #include "util.h"
 
diff --git a/ecp5/io.cc b/ecp5/pio.cc
similarity index 99%
rename from ecp5/io.cc
rename to ecp5/pio.cc
index 908caaba..65dcd704 100644
--- a/ecp5/io.cc
+++ b/ecp5/pio.cc
@@ -17,7 +17,7 @@
  *
  */
 
-#include "io.h"
+#include "pio.h"
 
 NEXTPNR_NAMESPACE_BEGIN
 
diff --git a/ecp5/io.h b/ecp5/pio.h
similarity index 100%
rename from ecp5/io.h
rename to ecp5/pio.h