1 files changed, 1 insertions, 1 deletions

diff --git a/src/symcoord.c b/src/symcoord.c
index e9374d7..798a946 100644
--- a/src/symcoord.c
+++ b/src/symcoord.c
@@ -286,7 +286,7 @@ gensym(SymData *sd)
         sd->rep            = realloc(sd->rep, nreps * sizeof(Cube));
         sd->generated      = true;
 
-        fprintf(stderr, "Found %lu classes\n", nreps);
+        fprintf(stderr, "Found %" PRIu64 " classes\n", nreps);
 
         if (!write_symdata_file(sd))
                 fprintf(stderr, "Error writing SymData file\n");