diff --git a/common/cli_simple.c b/common/cli_simple.c
index 7d91316..e80ba48 100644
--- a/common/cli_simple.c
+++ b/common/cli_simple.c
@@ -60,13 +60,14 @@
 	return nargs;
 }
 
-void cli_simple_process_macros(const char *input, char *output)
+int cli_simple_process_macros(const char *input, char *output, int max_size)
 {
 	char c, prev;
 	const char *varname_start = NULL;
 	int inputcnt = strlen(input);
-	int outputcnt = CONFIG_SYS_CBSIZE;
+	int outputcnt = max_size;
 	int state = 0;		/* 0 = waiting for '$'  */
+	int ret;
 
 	/* 1 = waiting for '(' or '{' */
 	/* 2 = waiting for ')' or '}' */
@@ -157,13 +158,18 @@
 		prev = c;
 	}
 
-	if (outputcnt)
+	ret = inputcnt ? -ENOSPC : 0;
+	if (outputcnt) {
 		*output = 0;
-	else
+	} else {
 		*(output - 1) = 0;
+		ret = -ENOSPC;
+	}
 
 	debug_parser("[PROCESS_MACROS] OUTPUT len %zd: \"%s\"\n",
 		     strlen(output_start), output_start);
+
+	return ret;
 }
 
  /*
@@ -239,7 +245,8 @@
 		debug_parser("token: \"%s\"\n", token);
 
 		/* find macros in this token and replace them */
-		cli_simple_process_macros(token, finaltoken);
+		cli_simple_process_macros(token, finaltoken,
+					  sizeof(finaltoken));
 
 		/* Extract arguments */
 		argc = cli_simple_parse_line(finaltoken, argv);