diff --git a/configure b/configure
index 85b6a69fbb..450d1bb45f 100755
--- a/configure
+++ b/configure
@@ -8146,7 +8146,7 @@ elif enabled_any msvc icl; then
         check_cflags -d2SSAOptimizer-
     # enable utf-8 source processing on VS2015 U2 and newer
     test_cpp_condition windows.h "_MSC_FULL_VER >= 190023918" &&
-        add_cflags -utf-8
+        add_allcflags -utf-8
 fi
 
 for pfx in "" host_; do