diff --git a/gdb/testsuite/lib/gdb.exp b/gdb/testsuite/lib/gdb.exp
index 6fb04869605..58f7c54cea0 100644
--- a/gdb/testsuite/lib/gdb.exp
+++ b/gdb/testsuite/lib/gdb.exp
@@ -2393,7 +2393,7 @@ proc host_file_normalize_mingw {filename unix_to_win} {
 
     foreach {unix_filename win_filename} $unix_to_win {
 	set mount_len [string length $unix_filename]
-	if {[string equal -length $mount_len $unix_filename $filename]} {
+	if {[string equal -nocase -length $mount_len $unix_filename $filename]} {
 	    if {$unix_filename eq "/"} {
 		if {$filename eq "/"} {
 		    return "$win_filename"