diff --git a/fs/littlefs/lfs_vfs.c b/fs/littlefs/lfs_vfs.c
index 073834eb2cd0a..c00174d1712bd 100644
--- a/fs/littlefs/lfs_vfs.c
+++ b/fs/littlefs/lfs_vfs.c
@@ -39,6 +39,14 @@
 #include "littlefs/lfs.h"
 #include "littlefs/lfs_util.h"
 
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#ifndef CONFIG_C99_BOOL
+#  error littlefs requires CONFIG_C99_BOOL to be selected
+#endif
+
 /****************************************************************************
  * Private Types
  ****************************************************************************/