diff --git a/llvm/include/llvm/Support/AutoConvert.h b/llvm/include/llvm/Support/AutoConvert.h
index 6608dd461d726..79566189d8197 100644
--- a/llvm/include/llvm/Support/AutoConvert.h
+++ b/llvm/include/llvm/Support/AutoConvert.h
@@ -30,7 +30,6 @@ extern "C" {
 int enableAutoConversion(int FD);
 int disableAutoConversion(int FD);
 int restoreStdHandleAutoConversion(int FD);
-int overrideAutoConversion(int FD, char *Filetag);
 #ifdef __cplusplus
 }
 #endif // __cplusplus