diff --git a/plugins/psgi/psgi_plugin.c b/plugins/psgi/psgi_plugin.c
index 612d8d14..98e3a3a4 100644
--- a/plugins/psgi/psgi_plugin.c
+++ b/plugins/psgi/psgi_plugin.c
@@ -824,8 +824,8 @@ static uint64_t uwsgi_perl_rpc(void *func, uint8_t argc, char **argv, uint16_t a
                 char *value = SvPV(response, rlen );
 		if (rlen > 0) {
 			*buffer = uwsgi_malloc(rlen);
+			memcpy(*buffer, value, ret);
 		}	
-		memcpy(buffer, value, ret);
 	}
 
         PUTBACK;
diff --git a/plugins/python/python_plugin.c b/plugins/python/python_plugin.c
index 2dc1962e..95cbc726 100644
--- a/plugins/python/python_plugin.c
+++ b/plugins/python/python_plugin.c
@@ -1548,7 +1548,7 @@ uint64_t uwsgi_python_rpc(void *func, uint8_t argc, char **argv, uint16_t argvs[
 			rl = PyString_Size(ret);
 			if (rl > 0) {
 				*buffer = uwsgi_malloc(rl);
-				memcpy(buffer, rv, rl);
+				memcpy(*buffer, rv, rl);
 				Py_DECREF(ret);
 				UWSGI_RELEASE_GIL;
 				return rl;
diff --git a/plugins/rack/rack_plugin.c b/plugins/rack/rack_plugin.c
index 7cba417e..6d7860c4 100644
--- a/plugins/rack/rack_plugin.c
+++ b/plugins/rack/rack_plugin.c
@@ -345,7 +345,7 @@ uint64_t uwsgi_ruby_rpc(void *func, uint8_t argc, char **argv, uint16_t argvs[],
                 rl = RSTRING_LEN(ret);
                 if (rl > 0) {
 			*buffer = uwsgi_malloc(rl);
-                	memcpy(buffer, rv, rl);
+                	memcpy(*buffer, rv, rl);
                         return rl;
                 }
         }