diff --git a/spine-cpp/spine-cpp/include/spine/SpineString.h b/spine-cpp/spine-cpp/include/spine/SpineString.h
index b566ffcb3d..7bba40dad3 100644
--- a/spine-cpp/spine-cpp/include/spine/SpineString.h
+++ b/spine-cpp/spine-cpp/include/spine/SpineString.h
@@ -39,11 +39,11 @@
 namespace spine {
 	class SP_API String : public SpineObject {
 	public:
-		String() : _length(0), _buffer(NULL), _tofree(true) {
+		String() : _length(0), _buffer(NULL), _tempowner(true) {
 		}
 
 		String(const char *chars, bool own = false, bool tofree = true) {
-			_tofree = tofree;
+			_tempowner = tofree;
 			if (!chars) {
 				_length = 0;
 				_buffer = NULL;
@@ -59,7 +59,7 @@ namespace spine {
 		}
 
 		String(const String &other) {
-			_tofree = true;
+			_tempowner = true;
 			if (!other._buffer) {
 				_length = 0;
 				_buffer = NULL;
@@ -84,7 +84,7 @@ namespace spine {
 
 		void own(const String &other) {
 			if (this == &other) return;
-			if (_buffer && _tofree) {
+			if (_buffer && _tempowner) {
 				SpineExtension::free(_buffer, __FILE__, __LINE__);
 			}
 			_length = other._length;
@@ -95,7 +95,7 @@ namespace spine {
 
 		void own(const char *chars) {
 			if (_buffer == chars) return;
-			if (_buffer && _tofree) {
+			if (_buffer && _tempowner) {
 				SpineExtension::free(_buffer, __FILE__, __LINE__);
 			}
 
@@ -115,7 +115,7 @@ namespace spine {
 
 		String &operator=(const String &other) {
 			if (this == &other) return *this;
-			if (_buffer && _tofree) {
+			if (_buffer && _tempowner) {
 				SpineExtension::free(_buffer, __FILE__, __LINE__);
 			}
 			if (!other._buffer) {
@@ -131,7 +131,7 @@ namespace spine {
 
 		String &operator=(const char *chars) {
 			if (_buffer == chars) return *this;
-			if (_buffer && _tofree) {
+			if (_buffer && _tempowner) {
 				SpineExtension::free(_buffer, __FILE__, __LINE__);
 			}
 			if (!chars) {
@@ -202,7 +202,7 @@ namespace spine {
 		}
 
 		~String() {
-			if (_buffer && _tofree) {
+			if (_buffer && _tempowner) {
 				SpineExtension::free(_buffer, __FILE__, __LINE__);
 			}
 		}
@@ -210,7 +210,7 @@ namespace spine {
 	private:
 		mutable size_t _length;
 		mutable char *_buffer;
-		mutable bool _tofree;
+		mutable bool _tempowner;
 	};
 }