diff --git a/README.md b/README.md
index 36f83fc..13ed871 100644
--- a/README.md
+++ b/README.md
@@ -36,6 +36,11 @@ Build the firmware:
 
     make
 
+Make sure the two BOOT jumpers are set as follows:
+
+    BOOT0: completey removed
+    BOOT1: set to BOOT 1 -
+
 And finally upload the firmware to the MMDVM_HS_Dual_Hat:
 
     sudo make mmdvm_hs_dual_hat