diff --git a/src/pubkey.cpp b/src/pubkey.cpp
--- a/src/pubkey.cpp
+++ b/src/pubkey.cpp
@@ -129,7 +129,6 @@
         return 0;
     }
     spos = pos;
-    pos += slen;
 
     /* Ignore leading zeroes in R */
     while (rlen > 0 && input[rpos] == 0) {