diff --git a/runtime/Jlib/foreign.java b/runtime/Jlib/foreign.java
index b683d5411..dbac275a4 100644
--- a/runtime/Jlib/foreign.java
+++ b/runtime/Jlib/foreign.java
@@ -1891,7 +1891,7 @@ public static boolean BGL_FAST_REALP(Object o)
 	 return (o instanceof real);
       }
 
-   public static boolean BGL_FAST_REALP(Object o, Object p)
+   public static boolean BGL_FAST_REALSP(Object o, Object p)
       {
 	 return (o instanceof real) && (p instanceof real);
       }