diff --git a/phreeqcpp/common/Parser.h b/phreeqcpp/common/Parser.h
index 3bf093a1..1f329b4d 100644
--- a/phreeqcpp/common/Parser.h
+++ b/phreeqcpp/common/Parser.h
@@ -280,13 +280,21 @@ class CParser: public PHRQ_base
 // Global functions
 static inline std::string &trim_left(std::string &s)
 { 
-	s.erase(s.begin(), std::find_if(s.begin(), s.end(), std::not1(std::ptr_fun<int, int>(std::isspace)))); 
+#if (__GNUC__ && (__cplusplus >= 201103L)) || (_MSC_VER >= 1600)
+	s.erase(s.begin(), std::find_if(s.begin(), s.end(), [](int c) {return !std::isspace(c);}));
+#else
+	s.erase(s.begin(), std::find_if(s.begin(), s.end(), std::not1(std::ptr_fun<int, int>(std::isspace))));
+#endif
 	return s; 
 } 
 static inline std::string &trim_right(std::string &s)
 { 
-	s.erase(std::find_if(s.rbegin(), s.rend(), std::not1(std::ptr_fun<int, int>(std::isspace))).base(), s.end()); 
-	return s; 
+#if (__GNUC__ && (__cplusplus >= 201103L)) || (_MSC_VER >= 1600)
+	s.erase(std::find_if(s.rbegin(), s.rend(), [](int c) {return !std::isspace(c);}).base(), s.end());
+#else
+	s.erase(std::find_if(s.rbegin(), s.rend(), std::not1(std::ptr_fun<int, int>(std::isspace))).base(), s.end());
+#endif
+	return s;
 } 
 static inline std::string &trim(std::string &s)
 {