diff --git a/poincare/Makefile b/poincare/Makefile
index 906f8fca6..5a6bc64d8 100644
--- a/poincare/Makefile
+++ b/poincare/Makefile
@@ -26,6 +26,7 @@ objs += $(addprefix poincare/src/,\
   left_square_bracket_layout_node.o\
   matrix_layout_node.o\
   nth_root_layout_node.o\
+  parenthesis_layout_node.o\
   product_layout_node.o\
   right_parenthesis_layout_node.o\
   right_square_bracket_layout_node.o\
diff --git a/poincare/include/poincare/parenthesis_layout_node.h b/poincare/include/poincare/parenthesis_layout_node.h
index 8ef390bc1..59945b867 100644
--- a/poincare/include/poincare/parenthesis_layout_node.h
+++ b/poincare/include/poincare/parenthesis_layout_node.h
@@ -24,7 +24,7 @@ public:
 #endif
 
 protected:
-  KDColor s_parenthesisWorkingBuffer[k_parenthesisCurveHeight*k_parenthesisCurveWidth];
+  static KDColor s_parenthesisWorkingBuffer[k_parenthesisCurveHeight*k_parenthesisCurveWidth];
   void computeSize() override {
     m_frame.setSize(KDSize(parenthesisWidth(), childHeight() + k_verticalMargin));
     m_sized = true;
diff --git a/poincare/src/parenthesis_layout_node.cpp b/poincare/src/parenthesis_layout_node.cpp
new file mode 100644
index 000000000..7d48c5886
--- /dev/null
+++ b/poincare/src/parenthesis_layout_node.cpp
@@ -0,0 +1,7 @@
+#include <poincare/parenthesis_layout_node.h>
+
+namespace Poincare {
+
+KDColor ParenthesisLayoutNode::s_parenthesisWorkingBuffer[];
+
+}