diff --git a/src/osd.cpp b/src/osd.cpp
index 2202e6db..ada003cf 100644
--- a/src/osd.cpp
+++ b/src/osd.cpp
@@ -460,7 +460,7 @@ void osd_t::print_slow()
                 int l = sizeof(alloc), n;
                 char *buf = alloc;
 #define bufprintf(s, ...) { n = snprintf(buf, l, s, __VA_ARGS__); n = n < 0 ? 0 : n; buf += n; l -= n; }
-                bufprintf("[OSD %lu] Slow op %lx", osd_num, op);
+                bufprintf("[OSD %lu] Slow op %lx", osd_num, (unsigned long)op);
                 if (kv.second->osd_num)
                 {
                     bufprintf(" from peer OSD %lu (client %d)", kv.second->osd_num, kv.second->peer_fd);
diff --git a/src/osd_primary_chain.cpp b/src/osd_primary_chain.cpp
index 64b061e8..01fc39ed 100644
--- a/src/osd_primary_chain.cpp
+++ b/src/osd_primary_chain.cpp
@@ -219,7 +219,7 @@ int osd_t::submit_bitmap_subops(osd_op_t *cur_op, pg_t & pg)
             op_data->n_subops++;
         }
     }
-    if (op_data->n_subops)
+    if (op_data->n_subops > 0)
     {
         op_data->fact_ver = 0;
         op_data->done = op_data->errors = 0;
diff --git a/src/osd_primary_subops.cpp b/src/osd_primary_subops.cpp
index 829f0b83..5b6ab48d 100644
--- a/src/osd_primary_subops.cpp
+++ b/src/osd_primary_subops.cpp
@@ -472,7 +472,7 @@ void osd_t::submit_primary_del_batch(osd_op_t *cur_op, obj_ver_osd_t *chunks_to_
     osd_primary_op_data_t *op_data = cur_op->op_data;
     op_data->n_subops = chunks_to_delete_count;
     op_data->done = op_data->errors = op_data->errcode = 0;
-    if (!op_data->n_subops)
+    if (op_data->n_subops <= 0)
     {
         return;
     }