diff --git a/libmapper/internal.h b/libmapper/internal.h
new file mode 100644
index 0000000..e6f9a07
--- /dev/null
+++ b/libmapper/internal.h
@@ -0,0 +1,10 @@
+#pragma once
+#ifdef __cplusplus
+extern "C" {
+#endif
+int sarraylen(char* array[]);
+void sarrayfree(char* array[]);
+char** sarraydup(char* array[]);
+#ifdef __cplusplus
+}
+#endif