diff --git a/src/Compilation.zig b/src/Compilation.zig
index ffbf5dd48752b4e68bbd9974f024c5b536b5d784..fc044f04047814ac3a6dd9589f451968eb412810 100644
--- a/src/Compilation.zig
+++ b/src/Compilation.zig
@@ -5916,9 +5916,9 @@ pub const FileExt = enum {
             .cpp => ".cpp",
             .cu => ".cu",
             .h => ".h",
-            .hpp => ".h",
-            .hm => ".h",
-            .hmm => ".h",
+            .hpp => ".hpp",
+            .hm => ".hm",
+            .hmm => ".hmm",
             .m => ".m",
             .mm => ".mm",
             .ll => ".ll",