diff --git a/testj1939.c b/testj1939.c
index 80b2d0b..8724349 100644
--- a/testj1939.c
+++ b/testj1939.c
@@ -302,7 +302,7 @@ int main(int argc, char *argv[])
 					printf("\n%05x    ", j);
 					j = 0;
 				}
-				printf(" %02x", dat[j]);
+				printf(" %02x", dat[i]);
 			}
 			printf("\n");
 		}