diff --git a/src/hb-ot-shape-complex-indic.cc b/src/hb-ot-shape-complex-indic.cc
index 1937380b8..0cb326aa8 100644
--- a/src/hb-ot-shape-complex-indic.cc
+++ b/src/hb-ot-shape-complex-indic.cc
@@ -217,7 +217,7 @@ set_indic_properties (hb_glyph_info_t &info)
 
   /* According to ScriptExtensions.txt, these Grantha marks may also be used in Tamil,
    * so the Indic shaper needs to know their categories. */
-  else if (unlikely (u == 0x11303u)) cat = OT_SM;
+  else if (unlikely (u == 0x11301u || u == 0x11303u)) cat = OT_SM;
   else if (unlikely (u == 0x1133cu)) cat = OT_N;
 
   else if (unlikely (u == 0x0AFBu)) cat = OT_N; /* https://github.com/behdad/harfbuzz/issues/552 */
diff --git a/test/shaping/fonts/sha1sum/b151cfcdaa77585d77f17a42158e0873fc8e2633.ttf b/test/shaping/fonts/sha1sum/b151cfcdaa77585d77f17a42158e0873fc8e2633.ttf
new file mode 100644
index 000000000..531f255f3
Binary files /dev/null and b/test/shaping/fonts/sha1sum/b151cfcdaa77585d77f17a42158e0873fc8e2633.ttf differ
diff --git a/test/shaping/tests/indic-script-extensions.tests b/test/shaping/tests/indic-script-extensions.tests
index d59d79a51..2d15402e6 100644
--- a/test/shaping/tests/indic-script-extensions.tests
+++ b/test/shaping/tests/indic-script-extensions.tests
@@ -1 +1,2 @@
 fonts/sha1sum/3493e92eaded2661cadde752a39f9d58b11f0326.ttf::U+0BA4,U+0BC6,U+1133C,U+0BAA,U+1133C,U+0BC6,U+1133C:[u0BC6=0+2093|u1133C=0+0|u0BA4=0+1863|u0BC6=3+2093|u1133C=3+0|u0BAA=3+1706|u1133C=3+0]
+fonts/sha1sum/b151cfcdaa77585d77f17a42158e0873fc8e2633.ttf::U+0BAA,U+11301,U+11303:[uni0BAA=0+535|u11301=0+0|u11303=0+310]