diff --git a/src/analysis.cpp b/src/analysis.cpp
index abb3f80..bee7c32 100644
--- a/src/analysis.cpp
+++ b/src/analysis.cpp
@@ -277,6 +277,13 @@ AnalysisResult analyze(Node &ast, Memory &memory) {
                     throw RuntimeError(ErrorType::NestedFunction, token.pos, {});
                 } catch (const InternalError& _) {}
 
+                if (memory.contains(function_name)) {
+                    // Il existe une variable non fonction à ce nom
+                    if (memory.get(function_name).type.type != TypeType::Function) {
+                        throw RuntimeError(ErrorType::IncompatibleRedefinition, token.pos, function_name);
+                    }
+                }
+
                 memory.declare(function_name, {
                     .type = TypeType::Function,
                     .data = make_fn_prototype(node)