diff --git a/std/numeric.d b/std/numeric.d
index 7a9992f80..02327f8bb 100644
--- a/std/numeric.d
+++ b/std/numeric.d
@@ -79,7 +79,7 @@ public enum CustomFloatFlags
     none = 0
 }
 
-enum isIEEEQuadruple = floatTraits!real.realFormat == RealFormat.ieeeQuadruple;
+private enum isIEEEQuadruple = floatTraits!real.realFormat == RealFormat.ieeeQuadruple;
 
 private template CustomFloatParams(uint bits)
 {