diff --git a/ext/curl/config.w32 b/ext/curl/config.w32
index 253c3e3cb635..db584c29e7ff 100644
--- a/ext/curl/config.w32
+++ b/ext/curl/config.w32
@@ -8,8 +8,7 @@ if (PHP_CURL != "no") {
 		SETUP_OPENSSL("curl", PHP_CURL) >= 2 &&
 		CHECK_LIB("winmm.lib", "curl", PHP_CURL) &&
 		CHECK_LIB("wldap32.lib", "curl", PHP_CURL) &&
-		(((PHP_ZLIB=="no") && (CHECK_LIB("zlib_a.lib;zlib.lib", "curl", PHP_CURL))) ||
-			(PHP_ZLIB_SHARED && CHECK_LIB("zlib.lib", "curl", PHP_CURL)) || (PHP_ZLIB == "yes" && (!PHP_ZLIB_SHARED))) &&
+		SETUP_ZLIB_LIB("curl", PHP_CURL) &&
 		(CHECK_LIB("normaliz.lib", "curl", PHP_CURL) &&
 		 CHECK_LIB("libssh2.lib", "curl", PHP_CURL) &&
 		 CHECK_LIB("nghttp2.lib", "curl", PHP_CURL))
diff --git a/ext/gd/config.w32 b/ext/gd/config.w32
index 939755bf539d..4e168fc3474f 100644
--- a/ext/gd/config.w32
+++ b/ext/gd/config.w32
@@ -16,8 +16,8 @@ if (PHP_GD != "no") {
 		CHECK_HEADER_ADD_INCLUDE("png.h", "CFLAGS_GD", PHP_GD +  ";" + PHP_PHP_BUILD + "\\include\\libpng12")) &&
 		(CHECK_LIB("libiconv_a.lib;libiconv.lib", "gd", PHP_GD) || CHECK_LIB("iconv_a.lib;iconv.lib", "gd", PHP_GD)) &&
 		 CHECK_HEADER_ADD_INCLUDE("iconv.h", "CFLAGS_GD", PHP_GD) &&
-		(((PHP_ZLIB=="no") && (CHECK_LIB("zlib_a.lib;zlib.lib", "gd", PHP_GD) )) ||
-			(PHP_ZLIB_SHARED && CHECK_LIB("zlib.lib", "gd", PHP_GD)) || (PHP_ZLIB == "yes" && (!PHP_ZLIB_SHARED)))
+		SETUP_ZLIB_LIB("gd", PHP_GD) &&
+		CHECK_HEADER_ADD_INCLUDE("zlib.h", "CFLAGS", "..\\zlib;" + php_usual_include_suspects)
 		) {
 
 		if (CHECK_LIB("libXpm_a.lib", "gd", PHP_GD) &&
diff --git a/ext/mysqlnd/config.w32 b/ext/mysqlnd/config.w32
index e9ff75f237ce..cf6bf4b61ccc 100644
--- a/ext/mysqlnd/config.w32
+++ b/ext/mysqlnd/config.w32
@@ -28,12 +28,9 @@ if (PHP_MYSQLND != "no") {
 			"mysqlnd_wireprotocol.c " +
 			"php_mysqlnd.c ";
 		EXTENSION("mysqlnd", mysqlnd_source, false, "/DZEND_ENABLE_STATIC_TSRMLS_CACHE=1");
-		if ((((PHP_ZLIB=="no") && (CHECK_LIB("zlib_a.lib;zlib.lib", "mysqlnd", PHP_MYSQLND))) ||
-			(PHP_ZLIB_SHARED && CHECK_LIB("zlib.lib", "mysqlnd", PHP_MYSQLND)) ||
-			(PHP_ZLIB == "yes" && (!PHP_ZLIB_SHARED))) &&
+		if (SETUP_ZLIB_LIB("mysqlnd", PHP_MYSQLND) &&
 			CHECK_HEADER_ADD_INCLUDE("zlib.h", "CFLAGS", "..\\zlib;" + php_usual_include_suspects)
-			)
-		{
+		) {
 			AC_DEFINE("MYSQLND_COMPRESSION_ENABLED", 1, "Define to 1 if mysqlnd has compressed protocol support.");
 			AC_DEFINE("MYSQLND_SSL_SUPPORTED", 1, "Define to 1 if mysqlnd core SSL is enabled.");
 			if (CHECK_LIB("crypt32.lib", "mysqlnd")) {
diff --git a/win32/build/confutils.js b/win32/build/confutils.js
index 3623dcf7e25e..e847417bc77b 100644
--- a/win32/build/confutils.js
+++ b/win32/build/confutils.js
@@ -3626,6 +3626,11 @@ function ADD_MAKEFILE_FRAGMENT(src_file)
 	}
 }
 
+function SETUP_ZLIB_LIB(target, path_to_check)
+{
+	return (PHP_ZLIB != "no" && !PHP_ZLIB_SHARED) || CHECK_LIB("zlib_a.lib;zlib.lib", target, path_to_check);
+}
+
 function SETUP_OPENSSL(target, path_to_check, common_name, use_env, add_dir_part, add_to_flag_only)
 {
 	var ret = 0;