diff --git a/libc/include/stdio.h b/libc/include/stdio.h
index 6abed458..ced477bf 100644
--- a/libc/include/stdio.h
+++ b/libc/include/stdio.h
@@ -56,7 +56,7 @@ extern "C"
 #endif
 
     /* Flush a stream's buffers. */
-    int fflush(FILE*);
+    int fflush(FILE* stream);
 
     /* Open a file and bind a stream to it. */
     FILE* fopen(const char* path, const char* mode);
@@ -67,7 +67,7 @@ extern "C"
     /* Change the underlying file and mode of a stream. */
     FILE* freopen(const char* path, const char* mode, FILE* stream);
 
-    /* Close a file and frees up its stream. */
+    /* Close a file and free up its stream. */
     int fclose(FILE* stream);
 
     /* Return the file descriptor associated with a stream. */