diff --git a/services-camel-app/src/main/java/edu/unc/lib/boxc/services/camel/images/ImageDerivativeProcessor.java b/services-camel-app/src/main/java/edu/unc/lib/boxc/services/camel/images/ImageDerivativeProcessor.java
index 418f91a248..4ac0a39f5a 100644
--- a/services-camel-app/src/main/java/edu/unc/lib/boxc/services/camel/images/ImageDerivativeProcessor.java
+++ b/services-camel-app/src/main/java/edu/unc/lib/boxc/services/camel/images/ImageDerivativeProcessor.java
@@ -19,7 +19,8 @@ public class ImageDerivativeProcessor implements Processor {
 
     private static final Pattern MIMETYPE_PATTERN = Pattern.compile("^(image.*$|application.*?(photoshop|psd)$)");
 
-    private static final Pattern DISALLOWED_PATTERN = Pattern.compile(".*(vnd\\.fpx|x-icon|x-raw-panasonic).*");
+    private static final Pattern DISALLOWED_PATTERN =
+            Pattern.compile(".*(vnd\\.fpx|x-icon|x-raw-panasonic|vnd\\.microsoft\\.icon).*");
 
     /**
      * Returns true if the subject of the exchange is a binary which
diff --git a/services-camel-app/src/test/java/edu/unc/lib/boxc/services/camel/images/ImageDerivativeProcessorTest.java b/services-camel-app/src/test/java/edu/unc/lib/boxc/services/camel/images/ImageDerivativeProcessorTest.java
index 5da7eba5dd..72e5138a57 100644
--- a/services-camel-app/src/test/java/edu/unc/lib/boxc/services/camel/images/ImageDerivativeProcessorTest.java
+++ b/services-camel-app/src/test/java/edu/unc/lib/boxc/services/camel/images/ImageDerivativeProcessorTest.java
@@ -73,4 +73,11 @@ public void testAllowedImageTypePhotoshop() {
 
         assertTrue(ImageDerivativeProcessor.allowedImageType(exchange));
     }
+
+    @Test
+    public void testAllowedImageTypeMicrosoft() {
+        when(messageIn.getHeader(CdrFcrepoHeaders.CdrBinaryMimeType)).thenReturn("image/vnd.microsoft.icon");
+
+        assertFalse(ImageDerivativeProcessor.allowedImageType(exchange));
+    }
 }