--- a/js/src/configure.in
+++ b/js/src/configure.in
@@ -1289,25 +1289,25 @@ if test "$GNU_CXX"; then
     # -Wtrigraphs - catches unlikely use of trigraphs
     # -Wtype-limits - catches overflow bugs, few false positives
     # -Wunknown-pragmas - catches unexpected #pragma directives
     # -Wunused-label - catches unused goto labels
     # -Wunused-value - catches unused expression results
     # -Wwrite-strings - catches non-const char* pointers to string literals
     #
     _WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} -Wall"
-    _WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} -Wignored-qualifiers"
     _WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} -Wsign-compare"
     _WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} -Wtype-limits"
 
     # Treat some warnings as errors:
     _WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} -Werror=char-subscripts"
     _WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} -Werror=comment"
     _WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} -Werror=empty-body"
     _WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} -Werror=endif-labels"
+    _WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} -Werror=ignored-qualifiers"
     _WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} -Werror=int-to-pointer-cast"
     _WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} -Werror=missing-braces"
     _WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} -Werror=overloaded-virtual"
     _WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} -Werror=pointer-arith"
     _WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} -Werror=reorder"
     _WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} -Werror=return-type"
     _WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} -Werror=sequence-point"
     _WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} -Werror=switch"