diff --git a/configure.ac b/configure.ac
index 0270e9da..b64e700b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -352,6 +352,7 @@ AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wsometimes-uninitialized], [CWFLAGS="$CWFLAGS -
 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wstrict-prototypes], [CWFLAGS="$CWFLAGS -Wstrict-prototypes"])
 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wswitch-enum], [CWFLAGS="$CWFLAGS -Wswitch-enum"])
 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wvariable-decl], [CWFLAGS="$CWFLAGS -Wvariable-decl"])
+AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wvla], [CWFLAGS="$WCFLAGS -Wvla"])
 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wwrite-strings], [CWFLAGS="$CWFLAGS -Wwrite-strings"])
 
 AS_IF([test "x$EMSCRIPTEN" = "x"], [