diff --git a/imageio/imageio-jpeg/src/main/java/com/twelvemonkeys/imageio/plugins/jpeg/JFIF.java b/imageio/imageio-jpeg/src/main/java/com/twelvemonkeys/imageio/plugins/jpeg/JFIF.java
index 26991295..7dcd8d9f 100644
--- a/imageio/imageio-jpeg/src/main/java/com/twelvemonkeys/imageio/plugins/jpeg/JFIF.java
+++ b/imageio/imageio-jpeg/src/main/java/com/twelvemonkeys/imageio/plugins/jpeg/JFIF.java
@@ -67,7 +67,7 @@ final class JFIF extends Application {
 
     @Override
     public String toString() {
-        return String.format("JFIF v%d.%02d %dx%d %s (%s)", majorVersion, minorVersion, xDensity, yDensity, unitsAsString(), thumbnailToString());
+        return String.format("APP0/JFIF v%d.%02d %dx%d %s (%s)", majorVersion, minorVersion, xDensity, yDensity, unitsAsString(), thumbnailToString());
     }
 
     private String unitsAsString() {
diff --git a/imageio/imageio-jpeg/src/main/java/com/twelvemonkeys/imageio/plugins/jpeg/JFXX.java b/imageio/imageio-jpeg/src/main/java/com/twelvemonkeys/imageio/plugins/jpeg/JFXX.java
index cb19ac87..39a9ffb4 100644
--- a/imageio/imageio-jpeg/src/main/java/com/twelvemonkeys/imageio/plugins/jpeg/JFXX.java
+++ b/imageio/imageio-jpeg/src/main/java/com/twelvemonkeys/imageio/plugins/jpeg/JFXX.java
@@ -56,7 +56,7 @@ final class JFXX extends Application {
 
     @Override
     public String toString() {
-        return String.format("JFXX extension (%s thumb size: %d)", extensionAsString(), thumbnail.length);
+        return String.format("APP0/JFXX extension (%s thumb size: %d)", extensionAsString(), thumbnail.length);
     }
 
     private String extensionAsString() {