diff --git a/src/ports/SkFontHost_FreeType.cpp b/src/ports/SkFontHost_FreeType.cpp
index 8d6c4d0..eb2f28a 100644
--- a/src/ports/SkFontHost_FreeType.cpp
+++ b/src/ports/SkFontHost_FreeType.cpp
@@ -605,7 +605,7 @@
                 FT_Fixed advances[128];
                 int advanceCount = 128;
                 if (gID + advanceCount > face->num_glyphs)
-                    advanceCount = face->num_glyphs - gID + 1;
+                    advanceCount = face->num_glyphs - gID;
                 getAdvances(face, gID, advanceCount, FT_LOAD_NO_SCALE,
                             advances);
                 for (int i = 0; i < advanceCount; i++) {