diff --git a/src/tests/add-ons/kernel/file_systems/fs_shell/argv.h b/src/tests/add-ons/kernel/file_systems/fs_shell/argv.h
index 0402ab2ce9..f2a881d3f9 100644
--- a/src/tests/add-ons/kernel/file_systems/fs_shell/argv.h
+++ b/src/tests/add-ons/kernel/file_systems/fs_shell/argv.h
@@ -1,2 +1,17 @@
+#ifndef FS_SHELL_ARGV_H
+#define FS_SHELL_ARGV_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
 /* this function takes a string and chops it into individual "words" */
 char **build_argv(char *str, int *argc);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif	// FS_SHELL_ARGV_H