diff --git a/src/discover/userconfig.c b/src/discover/userconfig.c
index 8f906ef07..8671d08fd 100644
--- a/src/discover/userconfig.c
+++ b/src/discover/userconfig.c
@@ -164,6 +164,8 @@ static const lang_name_entry_t LANG_NAME_TABLE[] = {
     {"form", CBM_LANG_FORM},
     {"magma", CBM_LANG_MAGMA},
     {"wolfram", CBM_LANG_WOLFRAM},
+    {"jinja2", CBM_LANG_JINJA2},
+    {"jinja", CBM_LANG_JINJA2},
 };
 
 #define LANG_NAME_TABLE_SIZE (sizeof(LANG_NAME_TABLE) / sizeof(LANG_NAME_TABLE[0]))
diff --git a/tests/test_userconfig.c b/tests/test_userconfig.c
index a9c3b4a5e..10eacec1b 100644
--- a/tests/test_userconfig.c
+++ b/tests/test_userconfig.c
@@ -39,7 +39,7 @@ TEST(userconfig_project_basic) {
     char proj[512];
     snprintf(proj, sizeof(proj), "%s/.codebase-memory.json", dir);
     ASSERT_EQ(
-        write_json(proj, "{\"extra_extensions\":{\".blade.php\":\"php\",\".mjs\":\"javascript\"}}"),
+        write_json(proj, "{\"extra_extensions\":{\".blade.php\":\"php\",\".mjs\":\"javascript\",\".html\":\"jinja2\"}}"),
         0);
 
     cbm_userconfig_t *cfg = cbm_userconfig_load(dir);
@@ -47,6 +47,7 @@ TEST(userconfig_project_basic) {
 
     ASSERT_EQ(cbm_userconfig_lookup(cfg, ".blade.php"), CBM_LANG_PHP);
     ASSERT_EQ(cbm_userconfig_lookup(cfg, ".mjs"), CBM_LANG_JAVASCRIPT);
+    ASSERT_EQ(cbm_userconfig_lookup(cfg, ".html"), CBM_LANG_JINJA2);
     ASSERT_EQ(cbm_userconfig_lookup(cfg, ".go"), CBM_LANG_COUNT); /* not in user config */
 
     cbm_userconfig_free(cfg);