diff --git a/ports/esp32/memory.h b/ports/esp32/memory.h
deleted file mode 100644
index 1f07fe409..000000000
--- a/ports/esp32/memory.h
+++ /dev/null
@@ -1,2 +0,0 @@
-// this is needed for lib/crypto-algorithms/sha256.c
-#include <string.h>