diff --git a/imageio/imageio-tga/src/main/java/com/twelvemonkeys/imageio/plugins/tga/TGAMetadata.java b/imageio/imageio-tga/src/main/java/com/twelvemonkeys/imageio/plugins/tga/TGAMetadata.java
index f3755c9c..a6abd54a 100755
--- a/imageio/imageio-tga/src/main/java/com/twelvemonkeys/imageio/plugins/tga/TGAMetadata.java
+++ b/imageio/imageio-tga/src/main/java/com/twelvemonkeys/imageio/plugins/tga/TGAMetadata.java
@@ -193,10 +193,13 @@ final class TGAMetadata extends AbstractMetadata {
 
         switch (header.getPixelDepth()) {
             case 8:
-                bitsPerSample.setAttribute("value", createListValue(1, Integer.toString(header.getPixelDepth())));
+                bitsPerSample.setAttribute("value", createListValue(1, "8"));
                 break;
             case 16:
-                if (header.getAttributeBits() > 0 && extensions != null && extensions.hasAlpha()) {
+                if (header.getImageType() == TGA.IMAGETYPE_MONOCHROME || header.getImageType() == TGA.IMAGETYPE_MONOCHROME_RLE) {
+                    bitsPerSample.setAttribute("value", "16");
+                }
+                else if (header.getAttributeBits() > 0 && extensions != null && extensions.hasAlpha()) {
                     bitsPerSample.setAttribute("value", "5, 5, 5, 1");
                 }
                 else {