diff --git a/crates/languages/src/cpp/config.toml b/crates/languages/src/cpp/config.toml
index 6aba8727f3b4250e5e44fac24a6519ede86fb5eb..ebd78870a29c760d1a5a34e791d0e2413a0de140 100644
--- a/crates/languages/src/cpp/config.toml
+++ b/crates/languages/src/cpp/config.toml
@@ -1,6 +1,6 @@
 name = "C++"
 grammar = "cpp"
-path_suffixes = ["cc", "hh", "cpp", "h", "hpp", "cxx", "hxx", "c++", "ipp", "inl", "cu", "cuh", "C", "H"]
+path_suffixes = ["cc", "hh", "cpp", "h", "hpp", "cxx", "hxx", "c++", "ipp", "inl", "ixx", "cu", "cuh", "C", "H"]
 line_comments = ["// ", "/// ", "//! "]
 autoclose_before = ";:.,=}])>"
 brackets = [
diff --git a/crates/theme/src/icon_theme.rs b/crates/theme/src/icon_theme.rs
index 637e41a58636db84aa42231753594858f39714fd..725fc3409c222ec169190f31d77ca33789b51d2b 100644
--- a/crates/theme/src/icon_theme.rs
+++ b/crates/theme/src/icon_theme.rs
@@ -85,7 +85,7 @@ const FILE_SUFFIXES_BY_ICON_KEY: &[(&str, &[&str])] = &[
     ("coffeescript", &["coffee"]),
     (
         "cpp",
-        &["c++", "cc", "cpp", "cxx", "hh", "hpp", "hxx", "inl"],
+        &["c++", "cc", "cpp", "cxx", "hh", "hpp", "hxx", "inl", "ixx"],
     ),
     ("crystal", &["cr", "ecr"]),
     ("csharp", &["cs"]),