diff --git a/include/blt/compatibility.h b/include/blt/compatibility.h
new file mode 100644
index 0000000..5414bc5
--- /dev/null
+++ b/include/blt/compatibility.h
@@ -0,0 +1,29 @@
+/*
+ *  BLT C++ 20 / C++ 17 Compatability helper file
+ *  Copyright (C) 2023  Brett Terpstra
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef INSANE_DNS_COMPATIBILITY_H
+#define INSANE_DNS_COMPATIBILITY_H
+
+#if __cplusplus >= 202002L
+    #define BLT_CONTAINS(container, value) container.contains(value)
+#else
+    #include <algorithm>
+    #define BLT_CONTAINS(container, value) std::find(container.begin(), container.end(), value) != container.end()
+#endif
+
+#endif //INSANE_DNS_COMPATIBILITY_H
diff --git a/include/blt/std/memory.h b/include/blt/std/memory.h
index 8c82442..aa16925 100755
--- a/include/blt/std/memory.h
+++ b/include/blt/std/memory.h
@@ -18,10 +18,6 @@
 #include <cstring>
 #include <array>
 
-#if __cplusplus >= 202002L
-    #include <bit>
-#endif
-
 #if defined(__clang__) || defined(__llvm__) || defined(__GNUC__) || defined(__GNUG__)
     
     #include <byteswap.h>
@@ -30,6 +26,7 @@
     #define SWAP32(val) bswap_32(val)
     #define SWAP64(val) bswap_64(val)
 #if __cplusplus >= 202002L
+    #include <bit>
     #define ENDIAN_LOOKUP(little_endian) (std::endian::native == std::endian::little && !little_endian) || \
                                          (std::endian::native == std::endian::big && little_endian)
 #else