diff --git a/src/bootstrap/configure.py b/src/bootstrap/configure.py
index 3d2eead6788bf..2a46c563d1f87 100755
--- a/src/bootstrap/configure.py
+++ b/src/bootstrap/configure.py
@@ -62,9 +62,9 @@ def v(*args):
 o("use-libcxx", "llvm.use-libcxx", "build LLVM with libc++")
 o("control-flow-guard", "rust.control-flow-guard", "Enable Control Flow Guard")
 
-o("cflags", "llvm.cflags", "build LLVM with these extra compiler flags")
-o("cxxflags", "llvm.cxxflags", "build LLVM with these extra compiler flags")
-o("ldflags", "llvm.ldflags", "build LLVM with these extra linker flags")
+v("llvm-cflags", "llvm.cflags", "build LLVM with these extra compiler flags")
+v("llvm-cxxflags", "llvm.cxxflags", "build LLVM with these extra compiler flags")
+v("llvm-ldflags", "llvm.ldflags", "build LLVM with these extra linker flags")
 
 o("llvm-libunwind", "rust.llvm-libunwind", "use LLVM libunwind")