diff --git a/meta-phosphor/recipes-core/dropbear/dropbear/localoptions.h b/meta-phosphor/recipes-core/dropbear/dropbear/localoptions.h
index 8aec3b3..4a3ebcf 100644
--- a/meta-phosphor/recipes-core/dropbear/dropbear/localoptions.h
+++ b/meta-phosphor/recipes-core/dropbear/dropbear/localoptions.h
@@ -1,6 +1,9 @@
 // Disable CBC ciphers for modern security.
 #define DROPBEAR_ENABLE_CBC_MODE 0
 
+// Disable Chacha20-Poly1305 cipher.
+#define DROPBEAR_CHACHA20POLY1305 0
+
 #define DROPBEAR_SHA1_96_HMAC 0
 #define DROPBEAR_SHA2_256_HMAC 1
 #define DROPBEAR_SHA2_512_HMAC 1