diff --git a/main/global_state.h b/main/global_state.h
index 65bd314c..b25778fb 100644
--- a/main/global_state.h
+++ b/main/global_state.h
@@ -52,8 +52,8 @@ typedef struct
     int historical_hashrate_init;
     double current_hashrate;
     int64_t start_time;
-    uint16_t shares_accepted;
-    uint16_t shares_rejected;
+    uint64_t shares_accepted;
+    uint64_t shares_rejected;
     int screen_page;
     char oled_buf[20];
     uint64_t best_nonce_diff;
diff --git a/main/system.c b/main/system.c
index 79c925ac..960d42c9 100644
--- a/main/system.c
+++ b/main/system.c
@@ -154,7 +154,7 @@ static void _update_shares(GlobalState * GLOBAL_STATE)
         case DEVICE_SUPRA:
             OLED_clearLine(1);
             memset(module->oled_buf, 0, 20);
-            snprintf(module->oled_buf, 20, "A/R: %u/%u", module->shares_accepted, module->shares_rejected);
+            snprintf(module->oled_buf, 20, "A/R: %llu/%llu", module->shares_accepted, module->shares_rejected);
             OLED_writeString(0, 1, module->oled_buf);
             break;
         default: