diff --git a/concrete/numpy/compilation/compiler.py b/concrete/numpy/compilation/compiler.py
index c4382324b..4a140c696 100644
--- a/concrete/numpy/compilation/compiler.py
+++ b/concrete/numpy/compilation/compiler.py
@@ -441,7 +441,7 @@ class Compiler:
 
             if show_optimizer:
                 if self.configuration.virtual:
-                    print("Virtual circuits doesn't have optimizer output.")
+                    print("Virtual circuits don't have optimizer output.")
 
                 print("-" * columns)
                 print()
diff --git a/concrete/numpy/mlir/graph_converter.py b/concrete/numpy/mlir/graph_converter.py
index ab58e0b04..078f5520a 100644
--- a/concrete/numpy/mlir/graph_converter.py
+++ b/concrete/numpy/mlir/graph_converter.py
@@ -453,7 +453,7 @@ class GraphConverter:
 
         GraphConverter._check_graph_convertibility(graph)
         if virtual:
-            return "Virtual circuits doesn't have MLIR."
+            return "Virtual circuits don't have MLIR."
 
         GraphConverter._update_bit_widths(graph)
         GraphConverter._offset_negative_lookup_table_inputs(graph)
diff --git a/tests/compilation/test_decorator.py b/tests/compilation/test_decorator.py
index e5b103784..ee0553830 100644
--- a/tests/compilation/test_decorator.py
+++ b/tests/compilation/test_decorator.py
@@ -115,12 +115,12 @@ Computation Graph
 
 MLIR
 ------------------------------------------------
-Virtual circuits doesn't have MLIR.
+Virtual circuits don't have MLIR.
 ------------------------------------------------
 
 Optimizer
 ------------------------------------------------
-Virtual circuits doesn't have optimizer output.
+Virtual circuits don't have optimizer output.
 ------------------------------------------------
 
         """.strip()