diff --git a/src/support/os_cygwin.cpp b/src/support/os_cygwin.cpp
index 032aae7f13..6b91873e3c 100644
--- a/src/support/os_cygwin.cpp
+++ b/src/support/os_cygwin.cpp
@@ -140,8 +140,7 @@ string current_root()
 
 bool isFilesystemCaseSensitive()
 {
-	// FIXME: is this correct?
-	return true;
+	return false;
 }