diff --git a/INSTALL b/INSTALL
index bd5967700..e25adeb1a 100644
--- a/INSTALL
+++ b/INSTALL
@@ -4,7 +4,7 @@ A C compiler.  Any C89 or better compiler should work.  Where supported,
 configure will attempt to enable the compiler's run-time integrity checking
 options.  Some notes about specific compilers:
  - clang: -ftrapv and -sanitize=integer require the compiler-rt runtime
-  (--with-ldflags=--rtlib=compiler-rt)
+  (CC=clang LDFLAGS=--rtlib=compiler-rt ./configure)
 
 You will need working installations of Zlib and libcrypto (LibreSSL /
 OpenSSL)