diff --git a/imageio/imageio-jpeg/src/main/java/com/twelvemonkeys/imageio/plugins/jpeg/JPEGImageReader.java b/imageio/imageio-jpeg/src/main/java/com/twelvemonkeys/imageio/plugins/jpeg/JPEGImageReader.java
index 33a3766a..94a08464 100644
--- a/imageio/imageio-jpeg/src/main/java/com/twelvemonkeys/imageio/plugins/jpeg/JPEGImageReader.java
+++ b/imageio/imageio-jpeg/src/main/java/com/twelvemonkeys/imageio/plugins/jpeg/JPEGImageReader.java
@@ -226,14 +226,14 @@ public class JPEGImageReader extends ImageReaderBase {
             ICC_Profile profile = getEmbeddedICCProfile(false);
 
             if (csType == JPEGColorSpace.CMYK || csType == JPEGColorSpace.YCCK) {
-                if (profile != null) {
+                if (profile != null && profile.getNumComponents() == 4) {
                     typeList.add(ImageTypeSpecifiers.createInterleaved(ColorSpaces.createColorSpace(profile), new int[] {3, 2, 1, 0}, DataBuffer.TYPE_BYTE, false, false));
                 }
 
                 typeList.add(ImageTypeSpecifiers.createInterleaved(ColorSpaces.getColorSpace(ColorSpaces.CS_GENERIC_CMYK), new int[] {3, 2, 1, 0}, DataBuffer.TYPE_BYTE, false, false));
             }
             else if (csType == JPEGColorSpace.YCbCr || csType == JPEGColorSpace.RGB) {
-                if (profile != null) {
+                if (profile != null && profile.getNumComponents() == 3) {
                     typeList.add(ImageTypeSpecifiers.createInterleaved(ColorSpaces.createColorSpace(profile), new int[] {0, 1, 2}, DataBuffer.TYPE_BYTE, false, false));
                 }
             }
@@ -246,8 +246,8 @@ public class JPEGImageReader extends ImageReaderBase {
                         ImageTypeSpecifiers.createFromBufferedImageType(BufferedImage.TYPE_4BYTE_ABGR_PRE)
                 ));
 
-                if (profile != null) {
-                    typeList.add(ImageTypeSpecifiers.createInterleaved(ColorSpaces.createColorSpace(profile), new int[] {0, 1, 2, 3}, DataBuffer.TYPE_BYTE, false, false));
+                if (profile != null && profile.getNumComponents() == 3) {
+                    typeList.add(ImageTypeSpecifiers.createInterleaved(ColorSpaces.createColorSpace(profile), new int[] {0, 1, 2, 3}, DataBuffer.TYPE_BYTE, true, false));
                 }
             }
 
@@ -274,10 +274,8 @@ public class JPEGImageReader extends ImageReaderBase {
                 // Create based on embedded profile if exists, or create from "Generic CMYK"
                 ICC_Profile profile = getEmbeddedICCProfile(false);
 
-                if (profile != null) {
-                    return ImageTypeSpecifiers.createInterleaved(ColorSpaces.createColorSpace(profile), new int[]{
-                            3, 2, 1, 0
-                    }, DataBuffer.TYPE_BYTE, false, false);
+                if (profile != null && profile.getNumComponents() == 4) {
+                    return ImageTypeSpecifiers.createInterleaved(ColorSpaces.createColorSpace(profile), new int[]{3, 2, 1, 0}, DataBuffer.TYPE_BYTE, false, false);
                 }
 
                 return ImageTypeSpecifiers.createInterleaved(ColorSpaces.getColorSpace(ColorSpaces.CS_GENERIC_CMYK), new int[] {3, 2, 1, 0}, DataBuffer.TYPE_BYTE, false, false);
@@ -385,6 +383,10 @@ public class JPEGImageReader extends ImageReaderBase {
                                     "Ignoring ICC profile, assuming source color space %s.",
                             intendedCS.getNumComponents(), startOfFrame.marker & 0xf, startOfFrame.componentsInFrame(), csType
                     ));
+
+                    if (csType == JPEGColorSpace.CMYK && image.getColorModel().getColorSpace().getType() != ColorSpace.TYPE_CMYK) {
+                        convert = new ColorConvertOp(ColorSpaces.getColorSpace(ColorSpaces.CS_GENERIC_CMYK), image.getColorModel().getColorSpace(), null);
+                    }
                 }
             }
             // NOTE: Avoid using CCOp if same color space, as it's more compatible that way
diff --git a/imageio/imageio-jpeg/src/test/java/com/twelvemonkeys/imageio/plugins/jpeg/JPEGImageReaderTest.java b/imageio/imageio-jpeg/src/test/java/com/twelvemonkeys/imageio/plugins/jpeg/JPEGImageReaderTest.java
index 169d7bbe..5ac66430 100644
--- a/imageio/imageio-jpeg/src/test/java/com/twelvemonkeys/imageio/plugins/jpeg/JPEGImageReaderTest.java
+++ b/imageio/imageio-jpeg/src/test/java/com/twelvemonkeys/imageio/plugins/jpeg/JPEGImageReaderTest.java
@@ -271,6 +271,29 @@ public class JPEGImageReaderTest extends ImageReaderAbstractTestCase<JPEGImageRe
         assertTrue(reader.hasThumbnails(0)); // Should not blow up!
     }
 
+    @Test
+    public void testCMYKWithRGBProfile() throws IOException {
+        // File contains JFIF (!), RGB ICC profile AND Adobe App14 specifying unknown conversion,
+        // but image data is 4 channel CMYK (from SOF0 channel Ids 'C', 'M', 'Y', 'K').
+        JPEGImageReader reader = createReader();
+        reader.setInput(ImageIO.createImageInputStream(getClassLoaderResource("/jpeg/jfif-cmyk-invalid-icc-profile-srgb.jpg")));
+
+        assertEquals(493, reader.getWidth(0));
+        assertEquals(500, reader.getHeight(0));
+
+        ImageReadParam param = reader.getDefaultReadParam();
+        param.setSourceRegion(new Rectangle(0, 0, 493, 16)); // Save some memory
+        BufferedImage image = reader.read(0, param);
+
+        assertNotNull(image);
+        assertEquals(493, image.getWidth());
+        assertEquals(16, image.getHeight());
+
+        // TODO: Need to test colors!
+
+        assertFalse(reader.hasThumbnails(0)); // Should not blow up!
+    }
+
     @Test
     public void testWarningEmbeddedColorProfileInvalidIgnored() throws IOException {
         JPEGImageReader reader = createReader();
diff --git a/imageio/imageio-jpeg/src/test/resources/jpeg/jfif-cmyk-invalid-icc-profile-srgb.jpg b/imageio/imageio-jpeg/src/test/resources/jpeg/jfif-cmyk-invalid-icc-profile-srgb.jpg
new file mode 100644
index 00000000..2df5b2d1
Binary files /dev/null and b/imageio/imageio-jpeg/src/test/resources/jpeg/jfif-cmyk-invalid-icc-profile-srgb.jpg differ