diff --git a/lib/rules_inline/sup.js b/lib/rules_inline/sup.js
index e78a431..414e7cd 100644
--- a/lib/rules_inline/sup.js
+++ b/lib/rules_inline/sup.js
@@ -57,9 +57,9 @@ module.exports = function sup(state, silent) {
   state.pos = start + 1;
 
   if (!silent) {
-    state.push({ type: 'sub_open', level: state.level++ });
+    state.push({ type: 'sup_open', level: state.level++ });
     state.parser.tokenize(state);
-    state.push({ type: 'sub_close', level: --state.level });
+    state.push({ type: 'sup_close', level: --state.level });
   }
 
   state.pos = state.posMax + 1;
diff --git a/test/fixtures/remarkable/sub.txt b/test/fixtures/remarkable/sub.txt
index 240714e..53dfbdf 100644
--- a/test/fixtures/remarkable/sub.txt
+++ b/test/fixtures/remarkable/sub.txt
@@ -2,7 +2,7 @@
 .
 ~foo ~bar~ baz~
 .
-<p><sup>foo <sup>bar</sup> baz</sup></p>
+<p><sub>foo <sub>bar</sub> baz</sub></p>
 .
 
 .