diff --git a/include/eigenpy/utils/is-aligned.hpp b/include/eigenpy/utils/is-aligned.hpp
index 2f2e892b294cfd98aca4c01501020adc8ec442e3..cfc057f732f658a1a63dc183e123e3202687caeb 100644
--- a/include/eigenpy/utils/is-aligned.hpp
+++ b/include/eigenpy/utils/is-aligned.hpp
@@ -1,12 +1,12 @@
 //
-// Copyright (c) 2020 INRIA
+// Copyright (c) 2020-2023 INRIA
 //
 
 #ifndef __eigenpy_utils_is_aligned_hpp__
 #define __eigenpy_utils_is_aligned_hpp__
 
 namespace eigenpy {
-inline bool is_aligned(void* ptr, std::size_t alignment) {
+inline bool is_aligned(const void* ptr, std::size_t alignment) {
   return (reinterpret_cast<std::size_t>(ptr) & (alignment - 1)) == 0;
 }
 }  // namespace eigenpy