diff --git a/src/interfaces/ecpg/ecpglib/sqlda.c b/src/interfaces/ecpg/ecpglib/sqlda.c
index 317d22f..a8a13de 100644
--- a/src/interfaces/ecpg/ecpglib/sqlda.c
+++ b/src/interfaces/ecpg/ecpglib/sqlda.c
@@ -121,7 +121,7 @@ sqlda_common_total_size(const PGresult *res, int row, enum COMPAT_MODE compat, l
 					if (!num)
 						break;
 					if (num->ndigits)
-						ecpg_sqlda_align_add_size(next_offset, sizeof(int), num->ndigits + 1, &offset, &next_offset);
+						ecpg_sqlda_align_add_size(next_offset, sizeof(int), num->digits - num->buf + num->ndigits, &offset, &next_offset);
 					PGTYPESnumeric_free(num);
 				}
 				break;
@@ -347,8 +347,8 @@ ecpg_set_compat_sqlda(int lineno, struct sqlda_compat **_sqlda, const PGresult *
 
 					if (num->ndigits)
 					{
-						ecpg_sqlda_align_add_size(next_offset, sizeof(int), num->ndigits + 1, &offset, &next_offset);
-						memcpy((char *) sqlda + offset, num->buf, num->ndigits + 1);
+						ecpg_sqlda_align_add_size(next_offset, sizeof(int), num->digits - num->buf + num->ndigits, &offset, &next_offset);
+						memcpy((char *) sqlda + offset, num->buf, num->digits - num->buf + num->ndigits);
 
 						((numeric *) sqlda->sqlvar[i].sqldata)->buf = (NumericDigit *) sqlda + offset;
 						((numeric *) sqlda->sqlvar[i].sqldata)->digits = (NumericDigit *) sqlda + offset + (num->digits - num->buf);
@@ -536,8 +536,8 @@ ecpg_set_native_sqlda(int lineno, struct sqlda_struct **_sqlda, const PGresult *
 
 					if (num->ndigits)
 					{
-						ecpg_sqlda_align_add_size(next_offset, sizeof(int), num->ndigits + 1, &offset, &next_offset);
-						memcpy((char *) sqlda + offset, num->buf, num->ndigits + 1);
+						ecpg_sqlda_align_add_size(next_offset, sizeof(int), num->digits - num->buf + num->ndigits, &offset, &next_offset);
+						memcpy((char *) sqlda + offset, num->buf, num->digits - num->buf + num->ndigits);
 
 						((numeric *) sqlda->sqlvar[i].sqldata)->buf = (NumericDigit *) sqlda + offset;
 						((numeric *) sqlda->sqlvar[i].sqldata)->digits = (NumericDigit *) sqlda + offset + (num->digits - num->buf);