diff --git a/gdb/configure.ac b/gdb/configure.ac
index f31ef2a..ea0cda9 100644
--- a/gdb/configure.ac
+++ b/gdb/configure.ac
@@ -1753,7 +1753,7 @@ fi
 build_warnings="-Wall -Wdeclaration-after-statement -Wpointer-arith \
 -Wformat-nonliteral -Wno-pointer-sign \
 -Wno-unused -Wunused-value -Wunused-function \
--Wno-switch -Wno-char-subscripts"
+-Wno-switch -Wno-char-subscripts -Wshadow"
 
 # Enable -Wno-format by default when using gcc on mingw since many
 # GCC versions complain about %I64.