diff --git a/README b/README
index 05a86cc..67d76ca 100644
--- a/README
+++ b/README
@@ -28,7 +28,7 @@ PHY:
   - Spartan6 DDR/LPDDR/DDR2/DDR3 PHY (1:2 or 1:4 frequency ratio)
   - Spartan7/Artix7/Kintex7/Virtex7 DDR2/DDR3 PHY (1:2 or 1:4 frequency ratio)
   - Kintex/Virtex Ultrascale DDR3/DDR4 PHY (1:4 frequency ratio)
-  - ECP5 DDR3 PHY (1:4 frequency ratio)
+  - ECP5 DDR3 PHY (1:2 frequency ratio)
 Core:
   - Fully pipelined, high performance.
   - Configurable commands depth on bankmachines.