diff --git a/lib/roken/base64-test.c b/lib/roken/base64-test.c
index 68cc6b5a4..86cccbb1d 100644
--- a/lib/roken/base64-test.c
+++ b/lib/roken/base64-test.c
@@ -66,7 +66,7 @@ main(int argc, char **argv)
 	}
 	free(str);
 	str = strdup(t->result);
-o	len = rk_base64_decode(t->result, str);
+	len = rk_base64_decode(t->result, str);
 	if(len != t->len) {
 	    fprintf(stderr, "failed test %d: len %lu != %lu\n", numtest,
 		    (unsigned long)len, (unsigned long)t->len);