diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index 227e3004077..d4f036a3f1e 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -11655,6 +11655,11 @@ proc check_effective_target_autoincdec { } {
 # 
 proc check_effective_target_supports_stack_clash_protection { } {
 
+    # Stack probing is done unconditionally out-of-line on Windows
+    if { [istarget *-*-cygwin*] || [istarget *-*-mingw*] } {
+	return 0
+    }
+
     if { [istarget x86_64-*-*] || [istarget i?86-*-*] 
 	  || [istarget powerpc*-*-*] || [istarget rs6000*-*-*]
 	  || [istarget aarch64*-**] || [istarget s390*-*-*]