diff --git a/include/xsimd/arch/xsimd_common_fwd.hpp b/include/xsimd/arch/xsimd_common_fwd.hpp
index b247b2bd6..139b0b282 100644
--- a/include/xsimd/arch/xsimd_common_fwd.hpp
+++ b/include/xsimd/arch/xsimd_common_fwd.hpp
@@ -60,6 +60,10 @@ namespace xsimd
         XSIMD_INLINE batch<T, A> bitwise_rshift(batch<T, A> const& self, batch<T, A> const& other, requires_arch<common>) noexcept;
         template <size_t shift, class A, class T, class = std::enable_if_t<std::is_integral_v<T>>>
         XSIMD_INLINE batch<T, A> bitwise_rshift(batch<T, A> const& self, requires_arch<common>) noexcept;
+        template <class A, class T, class Mask>
+        XSIMD_INLINE batch<T, A> decr_if(batch<T, A> const& self, Mask const& mask, requires_arch<common>) noexcept;
+        template <class A, class T, class Mask>
+        XSIMD_INLINE batch<T, A> incr_if(batch<T, A> const& self, Mask const& mask, requires_arch<common>) noexcept;
         template <class A, class T>
         XSIMD_INLINE batch_bool<T, A> gt(batch<T, A> const& self, batch<T, A> const& other, requires_arch<common>) noexcept;
         template <class A, class T, class = std::enable_if_t<std::is_integral_v<T>>>