diff --git a/src/cpp/jank/read/lex.cpp b/src/cpp/jank/read/lex.cpp
index 1623255ca..ee60f13d1 100644
--- a/src/cpp/jank/read/lex.cpp
+++ b/src/cpp/jank/read/lex.cpp
@@ -241,7 +241,7 @@ namespace jank::read
     {
       return std::isalnum(static_cast<unsigned char>(c)) != 0 || c == '_' || c == '-' || c == '/'
         || c == '?' || c == '!' || c == '+' || c == '*' || c == '=' || c == '.' || c == '&'
-        || c == '<' || c == '>';
+        || c == '<' || c == '>' || c == '#';
     }
 
     result<token, error> processor::next()
diff --git a/test/cpp/jank/read/lex.cpp b/test/cpp/jank/read/lex.cpp
index edaee3620..cc88a9fb9 100644
--- a/test/cpp/jank/read/lex.cpp
+++ b/test/cpp/jank/read/lex.cpp
@@ -646,11 +646,11 @@ namespace jank::read::lex
 
       SUBCASE("With other symbols")
       {
-        processor p{ "abc_.123/-foo+?=!&<>" };
+        processor p{ "abc_.123/-foo+?=!&<>#" };
         native_vector<result<token, error>> tokens(p.begin(), p.end());
         CHECK(tokens
               == make_tokens({
-                {0, 20, token_kind::symbol, "abc_.123/-foo+?=!&<>"sv}
+                {0, 21, token_kind::symbol, "abc_.123/-foo+?=!&<>#"sv}
         }));
       }