diff --git a/include/NZSL/Lang/ErrorList.hpp b/include/NZSL/Lang/ErrorList.hpp
index a7ab1fe..0798fe9 100644
--- a/include/NZSL/Lang/ErrorList.hpp
+++ b/include/NZSL/Lang/ErrorList.hpp
@@ -100,8 +100,9 @@ NZSL_SHADERLANG_COMPILER_ERROR(FunctionCallUnexpectedEntryFunction, "{} is an en
 NZSL_SHADERLANG_COMPILER_ERROR(FunctionCallUnmatchingParameterCount, "function {} expects {} parameter(s), but got {}", std::string, std::uint32_t, std::uint32_t)
 NZSL_SHADERLANG_COMPILER_ERROR(FunctionCallUnmatchingParameterType, "function {} parameter #{} type mismatch (expected {}, got {})", std::string, std::uint32_t, std::string, std::string)
 NZSL_SHADERLANG_COMPILER_ERROR(FunctionDeclarationInsideFunction, "a function cannot be defined inside another function")
-NZSL_SHADERLANG_COMPILER_ERROR(FunctionReturnStatementWithAValue, "return-statement with a value, in function returning no value")
-NZSL_SHADERLANG_COMPILER_ERROR(FunctionReturnStatementWithNoValue, "return-statement with no value, in function returning {}", std::string)
+NZSL_SHADERLANG_COMPILER_ERROR(FunctionReturnWithAValue, "return with a value, in function returning no value")
+NZSL_SHADERLANG_COMPILER_ERROR(FunctionReturnWithNoValue, "return with no value, in function returning {}", std::string)
+NZSL_SHADERLANG_COMPILER_ERROR(FunctionReturnUnmatchingTypes, "return expression type ({}) must match function return expression type ({})", std::string, std::string)
 NZSL_SHADERLANG_COMPILER_ERROR(IdentifierAlreadyUsed, "identifier {} is already used", std::string)
 NZSL_SHADERLANG_COMPILER_ERROR(ImportIdentifierAlreadyPresent, "{} identifier was already imported", std::string)
 NZSL_SHADERLANG_COMPILER_ERROR(ImportIdentifierNotFound, "identifier {} not found in module {}", std::string, std::string)
diff --git a/src/NZSL/Ast/SanitizeVisitor.cpp b/src/NZSL/Ast/SanitizeVisitor.cpp
index c1791da..ab7fd8a 100644
--- a/src/NZSL/Ast/SanitizeVisitor.cpp
+++ b/src/NZSL/Ast/SanitizeVisitor.cpp
@@ -2799,7 +2799,6 @@ NAZARA_WARNING_POP()
 	StatementPtr SanitizeVisitor::Clone(ReturnStatement& node)
 	{
 		auto clone = Nz::StaticUniquePointerCast<ReturnStatement>(Cloner::Clone(node));
-
 		Validate(*clone);
 
 		return clone;
@@ -4259,26 +4258,28 @@ NAZARA_WARNING_POP()
 		if (!function->node->returnType.IsResultingValue())
 			return ValidationResult::Unresolved;
 
-		const bool functionHasNoReturnType = std::holds_alternative<NoType>(function->node->returnType.GetResultingValue());
+		const ExpressionType& functionReturnType = function->node->returnType.GetResultingValue();
+		bool functionHasNoReturnType = std::holds_alternative<NoType>(functionReturnType);
 
 		if (!node.returnExpr)
 		{
 			if (!functionHasNoReturnType)
-				throw CompilerFunctionReturnStatementWithNoValueError{ node.sourceLocation, ToString(function->node->returnType.GetResultingValue(), node.sourceLocation) };
+				throw CompilerFunctionReturnWithNoValueError{ node.sourceLocation, ToString(functionReturnType, node.sourceLocation) };
 
 			//If node doesn't have an expression and function doesn't have return type, then we can directly validate
 			return ValidationResult::Validated;
 		}
 		
 		if (functionHasNoReturnType)
-			throw CompilerFunctionReturnStatementWithAValueError{ node.sourceLocation };
+			throw CompilerFunctionReturnWithAValueError{ node.sourceLocation };
 
 		const ExpressionType* returnTypeOpt = GetExpressionType(MandatoryExpr(node.returnExpr, node.sourceLocation));
 		if (!returnTypeOpt)
 			return ValidationResult::Unresolved;
 
 		ExpressionType returnType = ResolveType(*returnTypeOpt, true, node.sourceLocation);
-		TypeMustMatch(returnType, function->node->returnType.GetResultingValue(), node.sourceLocation);
+		if (returnType != ResolveAlias(functionReturnType))
+			throw CompilerFunctionReturnUnmatchingTypesError{ node.sourceLocation, ToString(returnType, node.sourceLocation), ToString(functionReturnType, node.sourceLocation) };
 		
 		return ValidationResult::Validated;
 	}
diff --git a/tests/src/Tests/ErrorsTests.cpp b/tests/src/Tests/ErrorsTests.cpp
index ce49e86..f68e4d7 100644
--- a/tests/src/Tests/ErrorsTests.cpp
+++ b/tests/src/Tests/ErrorsTests.cpp
@@ -718,7 +718,7 @@ fn test() -> i32
 {
 	return 42.666;
 }
-)"), "(7,2 -> 15): CUnmatchingTypes error: left expression type (f32) doesn't match right expression type (i32)");
+)"), "(7,2 -> 15): CFunctionReturnUnmatchingTypes error: return expression type (f32) must match function return expression type (i32)");
 
 			CHECK_THROWS_WITH(Compile(R"(
 [nzsl_version("1.0")]
@@ -728,7 +728,7 @@ fn test() -> i32
 {
 	return;
 }
-)"), "(7,2 -> 8): CFunctionReturnStatementWithNoValue error: return-statement with no value, in function returning i32");
+)"), "(7,2 -> 8): CFunctionReturnWithNoValue error: return with no value, in function returning i32");
 
 			CHECK_THROWS_WITH(Compile(R"(
 [nzsl_version("1.0")]
@@ -738,7 +738,7 @@ fn test()
 {
 	return 10;
 }
-)"), "(7,2 -> 11): CFunctionReturnStatementWithAValue error: return-statement with a value, in function returning no value");
+)"), "(7,2 -> 11): CFunctionReturnWithAValue error: return with a value, in function returning no value");
 		}
 
 		/************************************************************************/