diff --git a/sys/cddl/compat/opensolaris/kern/opensolaris_sunddi.c b/sys/cddl/compat/opensolaris/kern/opensolaris_sunddi.c
index 64edbe85bda..4a13cd8956c 100644
--- a/sys/cddl/compat/opensolaris/kern/opensolaris_sunddi.c
+++ b/sys/cddl/compat/opensolaris/kern/opensolaris_sunddi.c
@@ -41,10 +41,6 @@ ddi_strtol(const char *str, char **nptr, int base, long *result)
 {
 
 	*result = strtol(str, nptr, base);
-	if (*result == 0)
-		return (EINVAL);
-	else if (*result == LONG_MIN || *result == LONG_MAX)
-		return (ERANGE);
 	return (0);
 }
 
@@ -58,10 +54,6 @@ ddi_strtoul(const char *str, char **nptr, int base, unsigned long *result)
 	}
 
 	*result = strtoul(str, nptr, base);
-	if (*result == 0)
-		return (EINVAL);
-	else if (*result == ULONG_MAX)
-		return (ERANGE);
 	return (0);
 }
 
@@ -70,10 +62,6 @@ ddi_strtoull(const char *str, char **nptr, int base, unsigned long long *result)
 {
 
 	*result = (unsigned long long)strtouq(str, nptr, base);
-	if (*result == 0)
-		return (EINVAL);
-	else if (*result == ULLONG_MAX)
-		return (ERANGE);
 	return (0);
 }