diff --git a/src/hb-subset-instancer-solver.cc b/src/hb-subset-instancer-solver.cc
index 6b33c028a..c698d944c 100644
--- a/src/hb-subset-instancer-solver.cc
+++ b/src/hb-subset-instancer-solver.cc
@@ -245,7 +245,7 @@ _solve (Triple tent, Triple axisLimit, bool negative = false)
      *                       / \_|
      *  ..................../....+_.........outGain
      *                     /     | \
-     *  gain..............+......|..\_.............
+     *  gain..............+......|..+_.............
      *                   /|      |  | \
      *  0---|-----------o |      |  |  o----------1
      *    axisMin    lower|      |  |   upper