diff --git a/freelist/hexdump.c b/freelist/hexdump.c
index 36db76e..cdf2121 100644
--- a/freelist/hexdump.c
+++ b/freelist/hexdump.c
@@ -14,7 +14,7 @@ void hexdump(const void *data, size_t size) {
         // Print hex bytes
         for (j = 0; j < 16; j++) {
             if (i + j < size) {
-                printf("%02x ", p[i + j]);
+                printf("%02X ", p[i + j]);
             } else {
                 printf("   "); // padding for incomplete lines
             }