diff --git a/src/globals.h b/src/globals.h
index da55bf33..4d4579eb 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -11,7 +11,7 @@
 #define CURVE_SIZE_BYTES         32U
 #define UNCOMPRESSED_KEY_LENGTH  65U
 #define MIN_DER_SIGNATURE_LENGTH 67U
-#define MAX_DER_SIGNATURE_LENGTH 72U
+#define MAX_DER_SIGNATURE_LENGTH 73U
 
 #define CURVE_SECP256K1 0x00
 #define CURVE_SECP256R1 0x01