diff --git a/include/kernel_float/memory.h b/include/kernel_float/memory.h
index 5a9f3ee..e3aaaa1 100644
--- a/include/kernel_float/memory.h
+++ b/include/kernel_float/memory.h
@@ -1090,14 +1090,6 @@ vector_ptr(T*) -> vector_ptr<T, 1, access_policy<T>>;
 
 template<typename T>
 vector_ptr(const T*) -> vector_ptr<T, 1, access_policy<const T>>;
-
-#if __cpp_deduction_guides >= 201907L
-template<typename T>
-vec_ptr(T*) -> vec_ptr<T, 1>;
-
-template<typename T>
-vec_ptr(const T*) -> vec_ptr<T, 1, const T>;
-#endif
 #endif
 
 }  // namespace kernel_float
diff --git a/include/kernel_float/prelude.h b/include/kernel_float/prelude.h
index a723820..711aac0 100644
--- a/include/kernel_float/prelude.h
+++ b/include/kernel_float/prelude.h
@@ -108,18 +108,6 @@ static constexpr kconstant<long long int> operator""_c(unsigned long long int v)
     return static_cast<long long int>(v);
 }
 
-// Deduction guides for aliases are only supported from C++20
-#if defined(__cpp_deduction_guides) && __cpp_deduction_guides >= 201907L
-template<typename T>
-kscalar(T&&) -> kscalar<decay_t<T>>;
-
-template<typename... Args>
-kvec(Args&&...) -> kvec<promote_t<Args...>, sizeof...(Args)>;
-
-template<typename T>
-kconstant(T&&) -> kconstant<decay_t<T>>;
-#endif
-
 }  // namespace prelude
 }  // namespace kernel_float
 
diff --git a/include/kernel_float/vector.h b/include/kernel_float/vector.h
index 222db2e..9da8c38 100644
--- a/include/kernel_float/vector.h
+++ b/include/kernel_float/vector.h
@@ -380,12 +380,6 @@ KERNEL_FLOAT_INLINE vec<promote_t<Args...>, sizeof...(Args)> make_vec(Args&&...
 // Deduction guide for `vector`
 template<typename... Args>
 vector(Args&&... args) -> vector<promote_t<Args...>, extent<sizeof...(Args)>>;
-
-// Deduction guides for aliases are only supported from C++20
-#if __cpp_deduction_guides >= 201907L
-template<typename... Args>
-vec(Args&&... args) -> vec<promote_t<Args...>, sizeof...(Args)>;
-#endif
 #endif
 
 }  // namespace kernel_float
diff --git a/single_include/kernel_float.h b/single_include/kernel_float.h
index 1dc1d97..8dbdc40 100644
--- a/single_include/kernel_float.h
+++ b/single_include/kernel_float.h
@@ -16,8 +16,8 @@
 
 //================================================================================
 // this file has been auto-generated, do not modify its contents!
-// date: 2026-08-28 13:42:54.102829
-// git hash: 14a94fbc188ca3285e7351e5bb79184ce89c75d7
+// date: 2026-09-25 19:45:19.408615
+// git hash: 5226c9232b45c090be46c41e17034c089ffbf8d0
 //================================================================================
 
 #ifndef KERNEL_FLOAT_MACROS_H
@@ -3710,14 +3710,6 @@ vector_ptr(T*) -> vector_ptr<T, 1, access_policy<T>>;
 
 template<typename T>
 vector_ptr(const T*) -> vector_ptr<T, 1, access_policy<const T>>;
-
-#if __cpp_deduction_guides >= 201907L
-template<typename T>
-vec_ptr(T*) -> vec_ptr<T, 1>;
-
-template<typename T>
-vec_ptr(const T*) -> vec_ptr<T, 1, const T>;
-#endif
 #endif
 
 }  // namespace kernel_float
@@ -4571,12 +4563,6 @@ KERNEL_FLOAT_INLINE vec<promote_t<Args...>, sizeof...(Args)> make_vec(Args&&...
 // Deduction guide for `vector`
 template<typename... Args>
 vector(Args&&... args) -> vector<promote_t<Args...>, extent<sizeof...(Args)>>;
-
-// Deduction guides for aliases are only supported from C++20
-#if __cpp_deduction_guides >= 201907L
-template<typename... Args>
-vec(Args&&... args) -> vec<promote_t<Args...>, sizeof...(Args)>;
-#endif
 #endif
 
 }  // namespace kernel_float
@@ -5788,18 +5774,6 @@ static constexpr kconstant<long long int> operator""_c(unsigned long long int v)
     return static_cast<long long int>(v);
 }
 
-// Deduction guides for aliases are only supported from C++20
-#if defined(__cpp_deduction_guides) && __cpp_deduction_guides >= 201907L
-template<typename T>
-kscalar(T&&) -> kscalar<decay_t<T>>;
-
-template<typename... Args>
-kvec(Args&&...) -> kvec<promote_t<Args...>, sizeof...(Args)>;
-
-template<typename T>
-kconstant(T&&) -> kconstant<decay_t<T>>;
-#endif
-
 }  // namespace prelude
 }  // namespace kernel_float
 
diff --git a/tests/deduction.cu b/tests/deduction.cu
new file mode 100644
index 0000000..2e904f2
--- /dev/null
+++ b/tests/deduction.cu
@@ -0,0 +1,51 @@
+#include <type_traits>
+
+#include "common.h"
+#include "kernel_float/prelude.h"
+
+// Class template argument deduction. These tests run on host only: a bug in clang (HIP)
+// treats deduction guides as host functions, so CTAD cannot be used in device code.
+// See https://github.com/llvm/llvm-project/issues/146646 (fixed in LLVM 22 by
+// https://github.com/llvm/llvm-project/pull/170481).
+
+namespace deduction_tests {
+using namespace kernel_float::prelude;
+
+struct packed3 {
+    float x, y, z;  // sizeof(packed3) != alignof(packed3)
+};
+
+TEST_CASE("deduction guides") {
+    float* fp = nullptr;
+    const packed3* cp = nullptr;
+
+    kf::vector v(1, 2.0f);
+    STATIC_REQUIRE(std::is_same_v<decltype(v), kf::vec<float, 2>>);
+
+    kf::vector_ptr p(fp);
+    STATIC_REQUIRE(std::is_same_v<decltype(p), kf::vector_ptr<float, 1, kf::access_policy<float>>>);
+
+    kf::vector_ptr q(cp);
+    STATIC_REQUIRE(
+        std::is_same_v<decltype(q), kf::vector_ptr<packed3, 1, kf::access_policy<const packed3>>>);
+
+    kf::constant c(2.0);
+    STATIC_REQUIRE(std::is_same_v<decltype(c), kf::constant<double>>);
+    CHECK(c.get() == 2.0);
+}
+
+// From C++20, the compiler derives deduction guides for alias templates from those of the class
+// template they name.
+#if __cplusplus >= 202002L
+TEST_CASE("deduction guides for alias templates") {
+    kf::scalar s(1.5);
+    STATIC_REQUIRE(std::is_same_v<decltype(s), kf::scalar<double>>);
+
+    kscalar ks(1.5f);
+    STATIC_REQUIRE(std::is_same_v<decltype(ks), kscalar<float>>);
+
+    kconstant kc(2.0);
+    STATIC_REQUIRE(std::is_same_v<decltype(kc), kconstant<double>>);
+}
+#endif
+}  // namespace deduction_tests