diff --git a/src/include/port/win32.h b/src/include/port/win32.h
index c6213c77c3a..4b180bf30d2 100644
--- a/src/include/port/win32.h
+++ b/src/include/port/win32.h
@@ -13,10 +13,12 @@
  * Make sure _WIN32_WINNT has the minimum required value.
  * Leave a higher value in place. When building with at least Visual
  * Studio 2015 the minimum requirement is Windows Vista (0x0600) to
- * get support for GetLocaleInfoEx() with locales. For everything else
+ * get support for GetLocaleInfoEx() with locales. For other MSC versions
  * the minimum version is Windows XP (0x0501).
+ * For non-MSC compilers use 0x0600, which is required to get the inet_pton()
+ * declaration.
  */
-#if defined(_MSC_VER) && _MSC_VER >= 1900
+#if !defined(_MSC_VER) || _MSC_VER >= 1900
 #define MIN_WINNT 0x0600
 #else
 #define MIN_WINNT 0x0501