diff --git a/teavm-classlib/src/main/java/org/teavm/classlib/java/text/TDecimalFormat.java b/teavm-classlib/src/main/java/org/teavm/classlib/java/text/TDecimalFormat.java
index a91286a7a..37aac60f6 100644
--- a/teavm-classlib/src/main/java/org/teavm/classlib/java/text/TDecimalFormat.java
+++ b/teavm-classlib/src/main/java/org/teavm/classlib/java/text/TDecimalFormat.java
@@ -245,6 +245,7 @@ public class TDecimalFormat extends TNumberFormat {
                 position.setErrorIndex(index);
                 return null;
             }
+            position.setIndex(index);
             return positive ? Double.POSITIVE_INFINITY : Double.NEGATIVE_INFINITY;
         }