diff --git a/src/hb-ot-var-common.hh b/src/hb-ot-var-common.hh
index 9df798734..2081f1b9b 100644
--- a/src/hb-ot-var-common.hh
+++ b/src/hb-ot-var-common.hh
@@ -360,9 +360,12 @@ struct TupleVariationData
   {
     unsigned total_size = min_size;
     unsigned count = tupleVarCount;
-    const TupleVariationHeader& tuple_var_header = get_tuple_var_header();
+    const TupleVariationHeader *tuple_var_header = &(get_tuple_var_header());
     for (unsigned i = 0; i < count; i++)
-      total_size += tuple_var_header.get_size (axis_count) + tuple_var_header.get_data_size ();
+    {
+      total_size += tuple_var_header->get_size (axis_count) + tuple_var_header->get_data_size ();
+      tuple_var_header = &tuple_var_header->get_next (axis_count);
+    }
 
     return total_size;
   }
diff --git a/test/subset/data/expected/apply_cvar_delta/Muli-ABC.default.retain-all-codepoint.wght=300.ttf b/test/subset/data/expected/apply_cvar_delta/Muli-ABC.default.retain-all-codepoint.wght=300.ttf
new file mode 100644
index 000000000..d2680eb2d
Binary files /dev/null and b/test/subset/data/expected/apply_cvar_delta/Muli-ABC.default.retain-all-codepoint.wght=300.ttf differ
diff --git a/test/subset/data/expected/apply_cvar_delta/Muli-ABC.default.retain-all-codepoint.wght=700.ttf b/test/subset/data/expected/apply_cvar_delta/Muli-ABC.default.retain-all-codepoint.wght=700.ttf
new file mode 100644
index 000000000..d590978aa
Binary files /dev/null and b/test/subset/data/expected/apply_cvar_delta/Muli-ABC.default.retain-all-codepoint.wght=700.ttf differ
diff --git a/test/subset/data/fonts/Muli-ABC.ttf b/test/subset/data/fonts/Muli-ABC.ttf
new file mode 100644
index 000000000..60e652039
Binary files /dev/null and b/test/subset/data/fonts/Muli-ABC.ttf differ
diff --git a/test/subset/data/tests/apply_cvar_delta.tests b/test/subset/data/tests/apply_cvar_delta.tests
index 931cdf89b..d19d71a5b 100644
--- a/test/subset/data/tests/apply_cvar_delta.tests
+++ b/test/subset/data/tests/apply_cvar_delta.tests
@@ -1,5 +1,6 @@
 FONTS:
 Comfortaa-Regular-new.ttf
+Muli-ABC.ttf
 
 PROFILES:
 default.txt