diff --git a/binding/binding-util.cpp b/binding/binding-util.cpp
index 7e5d1b73..9349f197 100644
--- a/binding/binding-util.cpp
+++ b/binding/binding-util.cpp
@@ -70,16 +70,14 @@ const RbException excToRbExc[] = {
     MKXP    /* MKXPError   */
 };
 
-VALUE excToRbClass(const Exception &exc) {
+void raiseRbExc(Exception *exc) {
+  VALUE str = rb_str_new2(exc->msg.c_str());
   RbData *data = getRbData();
-  return data->exc[excToRbExc[exc.type]];
-}
+  VALUE excClass = data->exc[excToRbExc[exc->type]];
 
-void raiseRbExc(Exception exc) {
-  RbData *data = getRbData();
-  VALUE excClass = data->exc[excToRbExc[exc.type]];
+  delete exc;
 
-  rb_raise(excClass, "%s", exc.msg);
+  rb_exc_raise(rb_class_new_instance(1, &str, excClass));
 }
 
 void raiseDisposedAccess(VALUE self) {
@@ -311,9 +309,7 @@ int rb_get_args(int argc, VALUE *argv, const char *format, ...) {
     /* Raising here is probably fine, right?
      * If any methods allocate something with a destructor before
      * calling this then they can probably be fixed to not do that. */
-    Exception e(*exc);
-    delete exc;
-    rb_raise(excToRbClass(e), "%s", e.msg);
+    raiseRbExc(exc);
   }
 
   return 0;
@@ -333,7 +329,7 @@ static void *gvl_guard(void *args) {
 	try{
 		return gvl_args->func(gvl_args->args);
 	} catch (const Exception &e) {
-		gvl_args->exc = new Exception(e.type, e.msg);
+		gvl_args->exc = new Exception(e);
 	}
 	return 0;
 }
@@ -346,7 +342,7 @@ void *drop_gvl_guard(void *(*func)(void *), void *args,
 	
 	Exception *&exc = gvl_args.exc;
 	if (exc){
-		Exception e(exc->type, exc->msg);
+		Exception e(*exc);
 		delete exc;
 		throw e;
 	}
diff --git a/binding/binding-util.h b/binding/binding-util.h
index 4839e987..1cb6bc2f 100644
--- a/binding/binding-util.h
+++ b/binding/binding-util.h
@@ -75,8 +75,7 @@ RbData *getRbData();
 
 struct Exception;
 
-VALUE excToRbClass(const Exception &exc);
-void raiseRbExc(Exception exc);
+void raiseRbExc(Exception *exc);
 
 #if RAPI_MAJOR >= 2
 void *drop_gvl_guard(void *(*func)(void *), void *args,
@@ -494,9 +493,7 @@ static inline VALUE rb_file_open_str(VALUE filename, const char *mode) {
         exc = new Exception(e);                 \
     }                                           \
     if (exc) {                                  \
-        Exception e(*exc);                      \
-        delete exc;                             \
-        rb_raise(excToRbClass(e), "%s", e.msg); \
+        raiseRbExc(exc);                        \
     }                                           \
     return Qnil;                                \
 }
diff --git a/binding/serializable-binding.h b/binding/serializable-binding.h
index 4536503b..d6f42bea 100644
--- a/binding/serializable-binding.h
+++ b/binding/serializable-binding.h
@@ -44,10 +44,8 @@ serializableDump(int, VALUE *, VALUE self)
 	}
 
 	if (exc) {
-		Exception e(exc->type, exc->msg);
-		delete exc;
-		rb_raise(excToRbClass(e), "%s", e.msg);
-  }
+		raiseRbExc(exc);
+	}
 
 	return data;
 }
diff --git a/src/util/exception.h b/src/util/exception.h
index 3f52fca7..ae956000 100644
--- a/src/util/exception.h
+++ b/src/util/exception.h
@@ -48,7 +48,7 @@ struct Exception
 	};
 
 	Type type;
-	char msg[512];
+	std::string msg;
 
 	Exception(Type type, const char *format, ...)
 	    : type(type)
@@ -56,7 +56,8 @@ struct Exception
 		va_list ap;
 		va_start(ap, format);
 
-		vsnprintf(msg, sizeof(msg), format, ap);
+		msg.resize(512);
+		vsnprintf(&msg[0], msg.size(), format, ap);
 
 		va_end(ap);
 	}