diff --git a/grammar.js b/grammar.js
index f801526..f56928a 100644
--- a/grammar.js
+++ b/grammar.js
@@ -295,7 +295,7 @@ module.exports = grammar({
 
     charlist: ($) => choice($._quoted_i_single, $._quoted_i_heredoc_single),
 
-    interpolation: ($) => seq("#{", $._expression, "}"),
+    interpolation: ($) => seq("#{", optional($._expression), "}"),
 
     escape_sequence: ($) =>
       token(
diff --git a/test/corpus/term/string.txt b/test/corpus/term/string.txt
index 9869797..ed776bd 100644
--- a/test/corpus/term/string.txt
+++ b/test/corpus/term/string.txt
@@ -81,6 +81,18 @@ nested interpolation
           (integer))))
     (quoted_content)))
 
+=====================================
+empty interpolation
+=====================================
+
+"#{}"
+
+---
+
+(source
+  (string
+    (interpolation)))
+
 =====================================
 escape sequence
 =====================================