diff --git a/ldap.h b/ldap.h
index 6fbc08f..120d0a1 100644
--- a/ldap.h
+++ b/ldap.h
@@ -99,11 +99,13 @@ void freepal(struct PartialAttributeList* a);
 
 int scan_ldapstring(const char* src,const char* max,struct string* s);
 int scan_ldapmessage(const char* src,const char* max,
-		     long* messageid,long* op,long* len);
+		     unsigned long* messageid,unsigned long* op,
+		     unsigned long* len);
 int scan_ldapbindrequest(const char* src,const char* max,
-			 long* version,struct string* name,long* method);
+			 unsigned long* version,struct string* name,
+			 unsigned long* method);
 int scan_ldapbindresponse(const char* src,const char* max,
-			  long* result,struct string* matcheddn,
+			  unsigned long* result,struct string* matcheddn,
 			  struct string* errormessage,struct string* referral);
 int scan_ldapava(const char* src,const char* max,struct AttributeValueAssertion* a);
 int scan_ldapsearchfilter(const char* src,const char* max,struct Filter** f);
diff --git a/parse.c b/parse.c
index 721154d..b9d5970 100644
--- a/parse.c
+++ b/parse.c
@@ -1,3 +1,4 @@
+#include <alloca.h>
 #include <inttypes.h>
 #include <unistd.h>
 #include <sys/fcntl.h>
diff --git a/scan_ldapbindrequest.c b/scan_ldapbindrequest.c
index 4a213da..56dc42f 100644
--- a/scan_ldapbindrequest.c
+++ b/scan_ldapbindrequest.c
@@ -2,7 +2,8 @@
 #include "ldap.h"
 
 int scan_ldapbindrequest(const char* src,const char* max,
-			 long* version,struct string* name,long* method) {
+			 unsigned long* version,struct string* name,
+			 unsigned long* method) {
   int res,tmp;
   if (!(res=scan_asn1INTEGER(src,max,version))) return 0;
   if (!(tmp=scan_ldapstring(src+res,max,name))) return 0;
diff --git a/scan_ldapbindresponse.c b/scan_ldapbindresponse.c
index adb5da5..0ef6a38 100644
--- a/scan_ldapbindresponse.c
+++ b/scan_ldapbindresponse.c
@@ -2,7 +2,7 @@
 #include "ldap.h"
 
 int scan_ldapbindresponse(const char* src,const char* max,
-			  long* result,struct string* matcheddn,
+			  unsigned long* result,struct string* matcheddn,
 			  struct string* errormessage,struct string* referral) {
   int res,tmp;
   if (!(res=scan_asn1ENUMERATED(src,max,result))) return 0;
diff --git a/scan_ldapmessage.c b/scan_ldapmessage.c
index 27a740b..9f8ef15 100644
--- a/scan_ldapmessage.c
+++ b/scan_ldapmessage.c
@@ -2,7 +2,7 @@
 #include "ldap.h"
 
 int scan_ldapmessage(const char* src,const char* max,
-		     long* messageid,long* op,long* len) {
+		     unsigned long* messageid,unsigned long* op,unsigned long* len) {
   int res,tmp;
   if (!(res=scan_asn1SEQUENCE(src,max,len))) goto error;
   if (!(tmp=scan_asn1INTEGER(src+res,max,messageid))) goto error;