diff --git a/config.mk b/config.mk
index fbafe5a3..a8677d8c 100644
--- a/config.mk
+++ b/config.mk
@@ -21,10 +21,10 @@ CAPSTONE_ARCHS += x86
 
 ################################################################################
 # Comment out the line below ('USE_SYS_DYN_MEM = yes'), or change it to
-# 'USE_SYS_DYN_MEM = no' if do NOT use malloc()/calloc()/realloc()/free()
+# 'USE_SYS_DYN_MEM = no' if do NOT use malloc/calloc/realloc/free/vnsprintf()
 # provided by system for internal dynamic memory management.
 #
-# NOTE: in that case, you must specify your own malloc/calloc/realloc/free
+# NOTE: in that case, specify your own malloc/calloc/realloc/free/vnsprintf()
 # functions in your program via API cs_option(), using CS_OPT_MEM option type.
 USE_SYS_DYN_MEM = yes