diff --git a/src/lb_fwlc.c b/src/lb_fwlc.c
index a082505e3..4a6d5bd64 100644
--- a/src/lb_fwlc.c
+++ b/src/lb_fwlc.c
@@ -806,6 +806,7 @@ redo:
                                                 break;
                                         }
 					avoided = s;
+					unusable++;
 				}
 				else
 					unusable++;