diff --git a/src/constants.h b/src/constants.h
index 55cd17ef2..855a36199 100644
--- a/src/constants.h
+++ b/src/constants.h
@@ -33,7 +33,7 @@
  * Maximum scriptPubKey length for an output that we can recognize.
  */
 #define MAX_OUTPUT_SCRIPTPUBKEY_LEN 400  // max 393 for contracts; other scripts are shorter
-#define MAX_INPUT_SCRIPTPUBKEY_LEN  83   // max 83 for OP_RETURN; other scripts are shorter
+#define MAX_INPUT_SCRIPTPUBKEY_LEN  35  // P2PK's scriptPubKeys are the longest supported
 
 /**
  * Maximum length of a wallet registered into the device (characters), excluding terminating NULL.