--- a/src/tiffimage.cpp
+++ b/src/tiffimage.cpp
@@ -171,11 +171,15 @@
 #ifdef DEBUG
         std::cerr << "Reading TIFF file " << io_->path() << "\n";
 #endif
-        if (io_->open() != 0) throw Error(9, io_->path(), strError());
+        if (io_->open() != 0) {
+            throw Error(kerDataSourceOpenFailed, io_->path(), strError());
+        }
+
         IoCloser closer(*io_);
         // Ensure that this is the correct image type
         if (!isTiffType(*io_, false)) {
-            if (io_->error() || io_->eof()) throw Error(14);
+            if (io_->error() || io_->eof())
+                throw Error(kerFailedToReadImageData);
             throw Error(3, "TIFF");
         }
         clearMetadata();
@@ -190,12 +194,16 @@
         // read profile from the metadata
         Exiv2::ExifKey            key("Exif.Image.InterColorProfile");
         Exiv2::ExifData::iterator pos   = exifData_.findKey(key);
-        if ( pos != exifData_.end()  ) {
-            iccProfile_.alloc(pos->count()*pos->typeSize());
+        if ( pos != exifData_.end() ) {
+            long size = pos->count() * pos->typeSize();
+            if (size == 0) {
+                throw Error(kerFailedToReadImageData);
+            }
+            iccProfile_.alloc(size);
             pos->copy(iccProfile_.pData_,bo);
         }
 
-    } // TiffImage::readMetadata
+    }
 
     void TiffImage::writeMetadata()
     {