diff --git a/poincare/src/expression.cpp b/poincare/src/expression.cpp
index 53cb3d67a..8887b2cd6 100644
--- a/poincare/src/expression.cpp
+++ b/poincare/src/expression.cpp
@@ -3,9 +3,11 @@
 #include "expression_lexer.hpp"
 #include "simplify/simplify.h"
 #include "simplify/simplify_product_zero.h"
+#include "simplify/simplify_addition_integer.h"
 
 static expression_simplifier_t kSimplifiers[] = {
   &SimplifyProductZero,
+  &SimplifyAdditionInteger,
   nullptr
 };
 
diff --git a/poincare/test/simplify_addition_integer.cpp b/poincare/test/simplify_addition_integer.cpp
new file mode 100644
index 000000000..7ae500dc4
--- /dev/null
+++ b/poincare/test/simplify_addition_integer.cpp
@@ -0,0 +1,16 @@
+#include <quiz.h>
+#include <poincare.h>
+#include <assert.h>
+
+QUIZ_CASE(poincare_simplify_addition_integer) {
+  {
+    Expression * e = Expression::parse("3+0");
+    Expression * e2 = e->simplify();
+    assert(e2->type() == Expression::Type::Integer);
+  }
+  {
+    Expression * e = Expression::parse("3+foo+2");
+    Expression * e2 = e->simplify();
+    assert(e2->type() == Expression::Type::Addition);
+  }
+}