diff --git a/android/src/main/java/com/lwansbrough/RCTCamera/MutableImage.java b/android/src/main/java/com/lwansbrough/RCTCamera/MutableImage.java
index f77c9ab..3053674 100644
--- a/android/src/main/java/com/lwansbrough/RCTCamera/MutableImage.java
+++ b/android/src/main/java/com/lwansbrough/RCTCamera/MutableImage.java
@@ -219,7 +219,7 @@ public class MutableImage {
     // Even the value is formatted as double it is returned as a String because exif.setAttribute requires it.
     private String convertExposureTimeToDoubleFormat(String exposureTime) {
         if(!exposureTime.contains("/"))
-          return;
+          return "";
 
         String exposureFractions[]= exposureTime.split("/");
         double divider = Double.parseDouble(exposureFractions[1]);