diff --git a/.drone.jsonnet b/.drone.jsonnet
index 1a532b540..d1bd4d0ed 100644
--- a/.drone.jsonnet
+++ b/.drone.jsonnet
@@ -433,4 +433,10 @@ local windows_pipeline(name, image, environment, arch = "amd64") =
         "cppalliance/dronevs2022:1",
         { TOOLSET: 'msvc-14.3', CXXSTD: '14,17,20,latest' },
     ),
+
+    windows_pipeline(
+        "Windows VS2026 msvc-14.5",
+        "cppalliance/dronevs2026:1",
+        { TOOLSET: 'msvc-14.5', CXXSTD: '14,17,20,latest', ADDRMD: '32,64' },
+    ),
 ]
diff --git a/include/boost/decimal/decimal_fast128_t.hpp b/include/boost/decimal/decimal_fast128_t.hpp
index 06ce03b00..8a20f4fb3 100644
--- a/include/boost/decimal/decimal_fast128_t.hpp
+++ b/include/boost/decimal/decimal_fast128_t.hpp
@@ -87,7 +87,12 @@ constexpr auto write_payload(typename TargetDecimalType::significand_type payloa
 #  pragma warning(disable : 4324) // Structure was padded due to alignment specifier
 #endif
 
+// 32-bit MSVC mis-codegens reads of bool members in over-aligned structs; use natural alignment there.
+#if defined(_MSC_VER) && !defined(_M_X64) && !defined(_M_ARM64)
+BOOST_DECIMAL_EXPORT class decimal_fast128_t final
+#else
 BOOST_DECIMAL_EXPORT class alignas(16) decimal_fast128_t final
+#endif
 {
 public:
     using significand_type = int128::uint128_t;
diff --git a/include/boost/decimal/decimal_fast64_t.hpp b/include/boost/decimal/decimal_fast64_t.hpp
index 8db0b601a..9c17aa18f 100644
--- a/include/boost/decimal/decimal_fast64_t.hpp
+++ b/include/boost/decimal/decimal_fast64_t.hpp
@@ -87,7 +87,12 @@ constexpr auto write_payload(typename TargetDecimalType::significand_type payloa
 #  pragma warning(disable : 4324) // Structure was padded due to alignment specifier
 #endif
 
+// 32-bit MSVC mis-codegens reads of bool members in over-aligned structs; use natural alignment there.
+#if defined(_MSC_VER) && !defined(_M_X64) && !defined(_M_ARM64)
+BOOST_DECIMAL_EXPORT class decimal_fast64_t final
+#else
 BOOST_DECIMAL_EXPORT class alignas(8) decimal_fast64_t final
+#endif
 {
 public:
     using significand_type = std::uint64_t;