diff --git a/conf.py b/conf.py
index 3df958fe1f..07a29e32ba 100644
--- a/conf.py
+++ b/conf.py
@@ -139,7 +139,6 @@ exclude_patterns = ["**/build*",
                     "ports/stm32f4/stm32f4",
                     "ports/stm32f4/peripherals",
                     "ports/stm32f4/ref",
-                    "ports/stm32f4/README.md",
                     "ports/pic16bit",
                     "ports/qemu-arm",
                     "ports/stm32",