diff --git a/module/regex_create_char.cpp b/module/regex_create_char.cpp
index 786841db..a9c5c99d 100644
--- a/module/regex_create_char.cpp
+++ b/module/regex_create_char.cpp
@@ -9,7 +9,7 @@ module;
 #define BOOST_REGEX_DETAIL_NS re_detail_600
 #endif
 
-#ifndef BOOST_REGEX_USE_STD_MODULE
+#if !defined(BOOST_REGEX_USE_STD_MODULE) && !defined(MSVC_EXPERIMENTAL_STD_MODULE)
 #include <memory>
 #endif
 
diff --git a/module/regex_create_wchar_t.cpp b/module/regex_create_wchar_t.cpp
index e0d61a4a..cc335790 100644
--- a/module/regex_create_wchar_t.cpp
+++ b/module/regex_create_wchar_t.cpp
@@ -9,7 +9,7 @@ module;
 #define BOOST_REGEX_DETAIL_NS re_detail_600
 #endif
 
-#ifndef BOOST_REGEX_USE_STD_MODULE
+#if !defined(BOOST_REGEX_USE_STD_MODULE) && !defined(MSVC_EXPERIMENTAL_STD_MODULE)
 #include <memory>
 #endif
 
diff --git a/module/regex_nc_sfind.cpp b/module/regex_nc_sfind.cpp
index 4b2b83f2..131b4bed 100644
--- a/module/regex_nc_sfind.cpp
+++ b/module/regex_nc_sfind.cpp
@@ -5,7 +5,7 @@ module;
 #define BOOST_REGEX_USE_STD_MODULE
 #endif
 
-#ifndef BOOST_REGEX_USE_STD_MODULE
+#if !defined(BOOST_REGEX_USE_STD_MODULE) && !defined(MSVC_EXPERIMENTAL_STD_MODULE)
 #include <string>
 #endif
 
diff --git a/module/regex_nc_smatch.cpp b/module/regex_nc_smatch.cpp
index 2f92bb28..32fdaf6b 100644
--- a/module/regex_nc_smatch.cpp
+++ b/module/regex_nc_smatch.cpp
@@ -5,7 +5,7 @@ module;
 #define BOOST_REGEX_USE_STD_MODULE
 #endif
 
-#ifndef BOOST_REGEX_USE_STD_MODULE
+#if !defined(BOOST_REGEX_USE_STD_MODULE) && !defined(MSVC_EXPERIMENTAL_STD_MODULE)
 #include <string>
 #endif
 
diff --git a/module/regex_nc_wsfind.cpp b/module/regex_nc_wsfind.cpp
index 92a09641..ba64c5f2 100644
--- a/module/regex_nc_wsfind.cpp
+++ b/module/regex_nc_wsfind.cpp
@@ -5,7 +5,7 @@ module;
 #define BOOST_REGEX_USE_STD_MODULE
 #endif
 
-#ifndef BOOST_REGEX_USE_STD_MODULE
+#if !defined(BOOST_REGEX_USE_STD_MODULE) && !defined(MSVC_EXPERIMENTAL_STD_MODULE)
 #include <string>
 #endif
 
diff --git a/module/regex_nc_wsmatch.cpp b/module/regex_nc_wsmatch.cpp
index ee29130f..f4593301 100644
--- a/module/regex_nc_wsmatch.cpp
+++ b/module/regex_nc_wsmatch.cpp
@@ -5,7 +5,7 @@ module;
 #define BOOST_REGEX_USE_STD_MODULE
 #endif
 
-#ifndef BOOST_REGEX_USE_STD_MODULE
+#if !defined(BOOST_REGEX_USE_STD_MODULE) && !defined(MSVC_EXPERIMENTAL_STD_MODULE)
 #include <string>
 #endif
 
diff --git a/module/regex_sfind.cpp b/module/regex_sfind.cpp
index 35136b99..3bd44adb 100644
--- a/module/regex_sfind.cpp
+++ b/module/regex_sfind.cpp
@@ -5,7 +5,7 @@ module;
 #define BOOST_REGEX_USE_STD_MODULE
 #endif
 
-#ifndef BOOST_REGEX_USE_STD_MODULE
+#if !defined(BOOST_REGEX_USE_STD_MODULE) && !defined(MSVC_EXPERIMENTAL_STD_MODULE)
 #include <string>
 #endif
 
diff --git a/module/regex_smatch.cpp b/module/regex_smatch.cpp
index ace1ed8b..7ec21611 100644
--- a/module/regex_smatch.cpp
+++ b/module/regex_smatch.cpp
@@ -5,7 +5,7 @@ module;
 #define BOOST_REGEX_USE_STD_MODULE
 #endif
 
-#ifndef BOOST_REGEX_USE_STD_MODULE
+#if !defined(BOOST_REGEX_USE_STD_MODULE) && !defined(MSVC_EXPERIMENTAL_STD_MODULE)
 #include <string>
 #endif
 
diff --git a/module/regex_wsfind.cpp b/module/regex_wsfind.cpp
index 1d5b02e4..46cb56a1 100644
--- a/module/regex_wsfind.cpp
+++ b/module/regex_wsfind.cpp
@@ -5,7 +5,7 @@ module;
 #define BOOST_REGEX_USE_STD_MODULE
 #endif
 
-#ifndef BOOST_REGEX_USE_STD_MODULE
+#if !defined(BOOST_REGEX_USE_STD_MODULE) && !defined(MSVC_EXPERIMENTAL_STD_MODULE)
 #include <string>
 #endif
 
diff --git a/module/regex_wsmatch.cpp b/module/regex_wsmatch.cpp
index 45991d30..4b4d2eb0 100644
--- a/module/regex_wsmatch.cpp
+++ b/module/regex_wsmatch.cpp
@@ -5,7 +5,7 @@ module;
 #define BOOST_REGEX_USE_STD_MODULE
 #endif
 
-#ifndef BOOST_REGEX_USE_STD_MODULE
+#if !defined(BOOST_REGEX_USE_STD_MODULE) && !defined(MSVC_EXPERIMENTAL_STD_MODULE)
 #include <string>
 #endif