diff --git a/f256lib/file.c b/f256lib/file.c
index c7557d7..40727f4 100644
--- a/f256lib/file.c
+++ b/f256lib/file.c
@@ -40,7 +40,7 @@ static char    *pathWithoutDrive(char *path, byte *drive);
 
 #pragma push_macro("close")
 #undef close
-void fileClose(uint8_t *fd) {
+int8_t fileClose(uint8_t *fd) {
 	kernelArgs->file.close.stream = *fd;
 	kernelCall(File.Close);
 
@@ -51,11 +51,13 @@ void fileClose(uint8_t *fd) {
 		switch (kernelEventData.type) {
 			case kernelEvent(file.CLOSED):
 			case kernelEvent(file.ERROR):
-				return;
+				return -1;
 			default:
 				continue;
 		}
 	}
+
+	return 0;
 }
 #pragma pop_macro("close")
 
diff --git a/f256lib/file.h b/f256lib/file.h
index 6abf0db..5514114 100644
--- a/f256lib/file.h
+++ b/f256lib/file.h
@@ -41,7 +41,7 @@ typedef struct fileDirEntS {
 } fileDirEntT;
 
 
-void         fileClose(uint8_t *fd);
+int8_t       fileClose(uint8_t *fd);
 int8_t       fileCloseDir(char *dir);
 int8_t       fileMakeDir(char *dir);
 uint8_t     *fileOpen(char *fname, char *mode);
@@ -64,7 +64,6 @@ int16_t      fileWrite(void *buf, uint16_t nbytes, uint16_t nmemb, uint8_t *fd);
 
 // Aliases to the standard names if they don't exist.
 #ifndef DIR
-#define close      fileClose
 #define closedir   fileCloseDir
 #define DIR        char
 #define dirent     fileDirEntS