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diff --git a/src/3rdparty/autotrace/despeckle.h b/src/3rdparty/autotrace/despeckle.h
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+/* despeckle.h: Bitmap despeckler for AutoTrace
+
+   Copyright (C) 2001 David A. Bartold / Martin Weber
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public License
+   as published by the Free Software Foundation; either version 2.1 of
+   the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+   USA. */
+
+#ifndef DESPECKLE_H
+#define DESPECKLE_H
+
+#include "types.h"
+#include "bitmap.h"
+#include "exception.h"
+
+/* Despeckle - Despeckle a 8 or 24 bit image
+ *
+ * Input Parameters:
+ *   Adaptive feature coalescing value, the despeckling level and noise removal
+ *
+ *   Despeckling level (level): Integer from 0 to ~20
+ *     0 = perform no despeckling
+ *     An increase of the despeckling level by one doubles the size of features.
+ *     The Maximum value must be smaller then the logarithm base two of the number
+ *     of pixels.
+ *
+ *   Feature coalescing (tightness): Real from 0.0 to ~8.0
+ *     0 = Turn it off (whites may turn black and vice versa, etc)
+ *     3 = Good middle value
+ *     8 = Really tight
+ *
+ *   Noise removal (noise_removal): Real from 1.0 to 0.0
+ *     1 = Maximum noise removal
+ *     You should always use the highest value, only if certain parts of the image
+ *     disappear you should lower it.
+ *
+ * Modified Parameters:
+ *   The bitmap is despeckled.
+ */
+
+extern void despeckle(at_bitmap * bitmap, int level, gfloat tightness, gfloat noise_removal, at_exception_type * exp);
+
+#endif /* not DESPECKLE_H */