diff --git a/include/barry/models/geese/counters.hpp b/include/barry/models/geese/counters.hpp
index 0c97ec314..772eccaba 100644
--- a/include/barry/models/geese/counters.hpp
+++ b/include/barry/models/geese/counters.hpp
@@ -33,6 +33,9 @@
  * 
  * 
  */
+#define PHYLO_RULE_LAMBDA(a) barry::Rule_fun_type<PhyloArray, PhyloRuleData> a = \
+    [](const PhyloArray & Array, size_t i, size_t j, PhyloRuleData & data)
+
 #define PHYLO_COUNTER_LAMBDA(a) barry::Counter_fun_type<PhyloArray, PhyloCounterData> a = \
     [](const PhyloArray & Array, size_t i, size_t j, PhyloCounterData & data)
 
@@ -2046,6 +2049,32 @@ inline void counter_pairwise_first_gain(
  * @param rules A pointer to a `PhyloRules` object (`Rules`<`PhyloArray`, `PhyloRuleData`>).
  */
 ///@{
+inline void rule_leafs(
+    PhyloSupport * support
+) {
+
+    PHYLO_RULE_LAMBDA(tmp_rule)
+    {
+        if (Array.D().has_leaf)
+        {
+            return Array(i, j) != 9u;
+        }
+
+        return true;
+    };
+
+    support->get_rules()->add_rule(
+        tmp_rule,
+        PhyloRuleData(),
+        "Fix annotated leafs",
+        "Reduces the support by fixing the cells of annotated leafs."
+    );
+
+    return;
+
+}
+
+
 /**
  * @brief Overall functional gains
  * @param support Support of a model.
diff --git a/include/barry/models/geese/geese-bones.hpp b/include/barry/models/geese/geese-bones.hpp
index f38104d1d..2cee3aefb 100644
--- a/include/barry/models/geese/geese-bones.hpp
+++ b/include/barry/models/geese/geese-bones.hpp
@@ -42,8 +42,12 @@ inline std::vector< double > keygen_full(
     std::vector< double > dat = {
         static_cast<double>(array.nrow()) * 100000 +
          static_cast<double>(array.ncol()),
-         1000000.0, // state of the parent
-         array.D_ptr()->duplication ? 1.0 : 0.0 // type of the parent
+         // state of the parent
+         1000000.0, 
+         // type of the parent
+         array.D_ptr()->duplication ? 1.0 : 0.0, 
+         // Annotations with zeros
+         0.0 
     };
 
     // State of the parent
@@ -53,6 +57,13 @@ inline std::vector< double > keygen_full(
         pow10 *= 10.0;
     }
 
+    // // Annotations with zeros
+    // pow10 = 1.0;
+    // for (const auto & cell: array.get_data()) {
+    //     dat[3u] += (cell == 9u ? 2.0 : static_cast<double>(cell)) * pow10;
+    //     pow10 *= 10.0;
+    // }
+
     return dat;
     
 }
@@ -116,7 +127,7 @@ class Geese {
      */
     ///@{
     std::mt19937 *                     rengine = nullptr;
-    PhyloModel *        model   = nullptr;
+    PhyloModel * model   = nullptr;
     std::vector< std::vector< bool > > states;
     size_t n_zeros       = 0u; ///< Number of zeros
     size_t n_ones        = 0u; ///< Number of ones
diff --git a/include/barry/models/geese/geese-meat.hpp b/include/barry/models/geese/geese-meat.hpp
index bccde6180..5f36b43ca 100644
--- a/include/barry/models/geese/geese-meat.hpp
+++ b/include/barry/models/geese/geese-meat.hpp
@@ -141,6 +141,9 @@ inline void Geese::init(size_t bar_width) {
 
         this->model->store_psets();
 
+        // // Adding static rule
+        // rule_leafs(model->get_support_fun());
+
     }
 
     // Checking rseed, this is relevant when dealing with a flock. In the case of
diff --git a/include/barry/models/geese/geese-types.hpp b/include/barry/models/geese/geese-types.hpp
index c3c6e8676..445b83f78 100644
--- a/include/barry/models/geese/geese-types.hpp
+++ b/include/barry/models/geese/geese-types.hpp
@@ -25,18 +25,17 @@ class NodeData {
      */
     std::vector< bool > states = {};
     
-    /**
-     * 
-     */
-    bool duplication = true;
+    bool duplication = true; ///< Whether the node is a duplication.
+    bool has_leaf = false;   ///< Whether the node has a leaf as offspring.
     
-    // NodeData() : blengths(0u), states(0u) {};
     
     NodeData(
         const std::vector< double > & blengths_,
         const std::vector< bool > & states_,
-        bool duplication_ = true
-    ) : blengths(blengths_), states(states_), duplication(duplication_) {};
+        bool duplication_ = true,
+        bool has_leaf_ = false
+    ) : blengths(blengths_), states(states_), duplication(duplication_),
+        has_leaf(has_leaf_) {};
     
     // ~NodeData() {};
   
diff --git a/tests/Makefile b/tests/Makefile
index a8587e695..9d37cf358 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -50,3 +50,7 @@ main.cachegrind.out: main.o
 
 10.o: 10-geese-predict.cpp
 	$(CPP) $(CPPFLAGS) -O2 -g 10-geese-predict.cpp -o 10.o
+
+# Target depends on cpp file
+%.o: %.cpp
+	$(CPP) $(CPPFLAGS) -O2 -g $< -o $@