--- a/src/interfaces/ecpg/pgtypeslib/numeric.c
+++ b/src/interfaces/ecpg/pgtypeslib/numeric.c
@@ -1505,7 +1505,7 @@ PGTYPESnumeric_to_int(numeric *nv, int *ip)
    if ((i = PGTYPESnumeric_to_long(nv, &l)) != 0)
        return i;
 
-   if (l < -INT_MAX || l > INT_MAX)
+   if (l < (-INT_MAX - 1) || l > INT_MAX)
    {
        errno = PGTYPES_NUM_OVERFLOW;
        return -1;