diff --git a/sha1.c b/sha1.c
index 1200def..e2a4175 100644
--- a/sha1.c
+++ b/sha1.c
@@ -27,7 +27,7 @@ void main(int argc, char** argv) {
 }
 
 void printhash(hash_t* h) {
-  printf("%08X%08X%08X%08X%08X\n",
+  printf("%08x%08x%08x%08x%08x\n",
 		 h->h0,
 		 h->h1,
 		 h->h2,