diff --git a/ports/stm32/boards/STEAM32_WB55RG/manifest.py b/ports/stm32/boards/STEAM32_WB55RG/manifest.py
index 2b1e93a13f845..03d53462fe2ec 100644
--- a/ports/stm32/boards/STEAM32_WB55RG/manifest.py
+++ b/ports/stm32/boards/STEAM32_WB55RG/manifest.py
@@ -11,6 +11,7 @@
 # Register external library
 add_library("micropython-steami-lib", "$(STEAMI_LIB_DIR)")
 
+require("mcp23009e", library="micropython-steami-lib")
 require("ssd1327", library="micropython-steami-lib")
 require("apds9960", library="micropython-steami-lib")
 require("bq27441", library="micropython-steami-lib")