diff --git a/doc/src/sgml/ecpg.sgml b/doc/src/sgml/ecpg.sgml
index a98c1abf42..9130b12d69 100644
--- a/doc/src/sgml/ecpg.sgml
+++ b/doc/src/sgml/ecpg.sgml
@@ -9355,7 +9355,8 @@ risnull(CINTTYPE, (char *) &i);
ECPG_INFORMIX_DATE_CONVERT>
- Functions return this value if Internally it is defined to -1210 (the
+ Functions return this value if an error occurred during date
+ formatting. Internally it is defined to -1210 (the
Informix definition).
@@ -9365,7 +9366,8 @@ risnull(CINTTYPE, (char *) &i);
ECPG_INFORMIX_OUT_OF_MEMORY>
- Functions return this value if Internally it is defined to -1211 (the
+ Functions return this value if memory was exhausted during
+ their operation. Internally it is defined to -1211 (the
Informix definition).