1 files changed, 1 insertions, 1 deletions
diff --git a/README.md b/README.md
index bab83512..fbaa24f0 100644
--- a/README.md
+++ b/README.md
@@ -131,7 +131,7 @@ Note that *chash_sm_destroy(&theMap)* call below will also destroy all the neste
 
 void check_destroy(float* v) {printf("destroy %g\n", *v);}
 
-declare_CArray(f, float, check_destroy);
+declare_CArray(f, float, check_destroy); // normally omit the last argument - float type need no destroy.
 declare_CList(t2, CArray2_f, carray2_f_destroy, c_noCompare);
 declare_CHash(il, MAP, int, CList_t2, clist_t2_destroy);
 declare_CHash_string(sm, MAP, CHash_lm, chash_lm_destroy);