diff --git a/configure.ac b/configure.ac
index f9f3286563..00a5620529 100644
--- a/configure.ac
+++ b/configure.ac
@@ -467,6 +467,7 @@ AC_C_FLAG([-Wbad-function-cast])
 AC_C_FLAG([-Wwrite-strings])
 AC_C_FLAG([-Wundef])
 AC_C_FLAG([-Wimplicit-fallthrough])
+AC_C_FLAG([-Wshadow])
 if test "$enable_gcc_ultra_verbose" = "yes" ; then
   AC_C_FLAG([-Wcast-qual])
   AC_C_FLAG([-Wmissing-noreturn])
@@ -474,7 +475,6 @@ if test "$enable_gcc_ultra_verbose" = "yes" ; then
   AC_C_FLAG([-Wunreachable-code])
   AC_C_FLAG([-Wpacked])
   AC_C_FLAG([-Wpadded])
-  AC_C_FLAG([-Wshadow])
 else
   AC_C_FLAG([-Wno-unused-result])
 fi