diff --git a/include/fmt/format.h b/include/fmt/format.h
index 619402ce..cedf520a 100644
--- a/include/fmt/format.h
+++ b/include/fmt/format.h
@@ -3859,7 +3859,7 @@ FMT_END_NAMESPACE
     return S{}; \
   }()
 
-#ifndef FMT_NO_FMT_STRING_ALIAS
+#if defined(FMT_STRING_ALIAS) && FMT_STRING_ALIAS
 /**
   \rst
   Constructs a compile-time format string.
diff --git a/test/ostream-test.cc b/test/ostream-test.cc
index 96f6066c..cfde1889 100644
--- a/test/ostream-test.cc
+++ b/test/ostream-test.cc
@@ -5,6 +5,7 @@
 //
 // For the license information refer to format.h.
 
+#define FMT_STRING_ALIAS 1
 #include "fmt/ostream.h"
 
 #include <sstream>