diff --git a/src/imageformats/chunks.cpp b/src/imageformats/chunks.cpp
index 7c91e0c..75b8390 100644
--- a/src/imageformats/chunks.cpp
+++ b/src/imageformats/chunks.cpp
@@ -617,7 +617,7 @@ CAMGChunk::CAMGChunk() : IFFChunk()
 
 bool CAMGChunk::isValid() const
 {
-    if (bytes() != 4) {
+    if (dataBytes() != 4) {
         return false;
     }
     return chunkId() == CAMGChunk::defaultChunkId();