diff --git a/code/ryzom/server/src/ai_share/16x16_layer.cpp b/code/ryzom/server/src/ai_share/16x16_layer.cpp
index 4e78cf54e..734e4bde3 100644
--- a/code/ryzom/server/src/ai_share/16x16_layer.cpp
+++ b/code/ryzom/server/src/ai_share/16x16_layer.cpp
@@ -88,9 +88,9 @@ I16x16Layer		*I16x16Layer::compress(I16x16Layer *layer, sint32 blank)
 
 	map<sint32, uint>	count;
 
-	for (i=0; i<256; ++i)
+	for (i=0; i<16; ++i) for (j=0;j<16;++j)
 	{
-		sint32	val = flayer->Array[0][i];
+		sint32	val = flayer->Array[i][j];
 
 		if (val == blank)
 			continue;
diff --git a/code/ryzom/server/src/ai_share/16x16_layer.h b/code/ryzom/server/src/ai_share/16x16_layer.h
index d8c3af912..fd8853966 100644
--- a/code/ryzom/server/src/ai_share/16x16_layer.h
+++ b/code/ryzom/server/src/ai_share/16x16_layer.h
@@ -141,7 +141,11 @@ public:
 	void	set(uint i, uint j, sint value)	{ nlassert(i<16 && j<16); Array[i][j] = value; }
 
 protected:
-	void	serial(NLMISC::IStream &f)	{ for (uint i=0; i<16*16; ++i)	f.serial(Array[0][i]); }
+	void	serial(NLMISC::IStream &f)	{
+		for (uint i=0; i<16; ++i)
+			for (uint j=0; j<16; ++j)
+				f.serial(Array[i][j]);
+	}
 };
 
 /**
@@ -166,8 +170,9 @@ protected:
 	void	serial(NLMISC::IStream &f)
 	{
 		f.serial(Mean);
-		for (uint i=0; i<16*16; ++i)
-			f.serial(Array[0][i]);
+		for (uint i=0; i<16; ++i)
+			for(uint j=0; j<16; ++j)
+				f.serial(Array[i][j]);
 	}
 };
 
@@ -193,8 +198,9 @@ protected:
 	void	serial(NLMISC::IStream &f)
 	{
 		f.serial(Mean);
-		for (uint i=0; i<16*2; ++i)
-			f.serial(Array[0][i]);
+		for (uint i=0; i<16; ++i)
+			for (uint j=0; j<2; ++j)
+				f.serial(Array[i][j]);
 	}
 };