diff --git a/src/include/switch_platform.h b/src/include/switch_platform.h
index dfd8c012bc..e0cf9cd51b 100644
--- a/src/include/switch_platform.h
+++ b/src/include/switch_platform.h
@@ -268,7 +268,7 @@ typedef intptr_t switch_ssize_t;
 #endif
 
 
-#if UINTPTR_MAX == 0xffffffffffffffff
+#if UINTPTR_MAX == 0xffffffffffffffff || defined(_WIN64)
 #define FS_64BIT 1
 #endif
 
diff --git a/src/include/switch_version.h.template b/src/include/switch_version.h.template
index 06169d603f..61ebca8a98 100644
--- a/src/include/switch_version.h.template
+++ b/src/include/switch_version.h.template
@@ -37,7 +37,7 @@
 extern "C" {
 #endif
 
-#if UINTPTR_MAX == 0xffffffffffffffff
+#if UINTPTR_MAX == 0xffffffffffffffff || defined(_WIN64)
 #define _fs__bits "64bit"
 #else
 #define _fs__bits "32bit"