diff --git a/system/debugpoint/debug.c b/system/debugpoint/debug.c
index 06341ad782..b4f951ec46 100644
--- a/system/debugpoint/debug.c
+++ b/system/debugpoint/debug.c
@@ -38,7 +38,7 @@
  ****************************************************************************/
 
 static uint8_t g_test_data[8];
-static const char g_test_rodata[] = "This is a read-only string";
+static const char g_test_rodata[32] = "This is a read-only string";
 
 /****************************************************************************
  * Name: debug_option