diff --git a/lib/modulemap/module.modulemap b/lib/modulemap/module.modulemap
index 5e09fca9e..2344fd947 100644
--- a/lib/modulemap/module.modulemap
+++ b/lib/modulemap/module.modulemap
@@ -1,4 +1,4 @@
-module libzstd {
-    umbrella header "../zstd.h"
+module libzstd [extern_c] {
+    umbrella header "zstd-umbrella.h"
     export *
 }
diff --git a/lib/modulemap/zstd-umbrella.h b/lib/modulemap/zstd-umbrella.h
new file mode 100644
index 000000000..531e71254
--- /dev/null
+++ b/lib/modulemap/zstd-umbrella.h
@@ -0,0 +1 @@
+#include "../zstd.h"
\ No newline at end of file