diff --git a/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/RRuntime.java b/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/RRuntime.java
index 41cbb7339092d7876e6b919f79a85edb3997a043..cca0c4756eb79a04c674b64bb2bf0d52bcec5cc3 100644
--- a/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/RRuntime.java
+++ b/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/RRuntime.java
@@ -173,7 +173,7 @@ public class RRuntime {
     }
 
     public static boolean isNAorNaN(double d) {
-        return isNA(d) || Double.isNaN(d);
+        return Double.isNaN(d);
     }
 
     @TruffleBoundary