diff --git a/table/format.cc b/table/format.cc
index 3d48b421d..12937b366 100644
--- a/table/format.cc
+++ b/table/format.cc
@@ -65,8 +65,8 @@ Status Footer::DecodeFrom(Slice* input) {
     if (magic != table_magic_number()) {
       char buffer[80];
       snprintf(buffer, sizeof(buffer) - 1,
-               "not an sstable (bad magic number --- %#" PRIx64 ")",
-               magic);
+               "not an sstable (bad magic number --- %lx)",
+               (long)magic);
       return Status::InvalidArgument(buffer);
     }
   } else {
diff --git a/tools/sst_dump.cc b/tools/sst_dump.cc
index 6ad08c8a8..7abcb2e5a 100644
--- a/tools/sst_dump.cc
+++ b/tools/sst_dump.cc
@@ -135,8 +135,8 @@ Status SstFileReader::SetTableOptionsByMagicNumber(uint64_t table_magic_number,
   } else {
     char error_msg_buffer[80];
     snprintf(error_msg_buffer, sizeof(error_msg_buffer) - 1,
-             "Unsupported table magic number --- %#" PRIx64,
-             table_magic_number);
+             "Unsupported table magic number --- %lx",
+             (long)table_magic_number);
     return Status::InvalidArgument(error_msg_buffer);
   }