diff --git a/plugins/autolabor.cpp b/plugins/autolabor.cpp
index b8c89215e..95863ffb5 100644
--- a/plugins/autolabor.cpp
+++ b/plugins/autolabor.cpp
@@ -1311,6 +1311,10 @@ DFhackCExport command_result plugin_onupdate ( color_ostream &out )
                     continue;
                 dwarfs[dwarf]->status.labors[labor] = false;
             }
+            if (dwarf_info[dwarf].state == IDLE || dwarf_info[dwarf].state == BUSY || dwarf_info[dwarf].state == EXCLUSIVE)
+            {
+                num_haulers--;
+            }
             continue;
         }