diff --git a/src/netbase.cpp b/src/netbase.cpp
index 45fdca571..8b30ffc14 100644
--- a/src/netbase.cpp
+++ b/src/netbase.cpp
@@ -22,7 +22,7 @@ int nConnectTimeout = 5000;
 
 static const unsigned char pchIPv4[12] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff };
 
-bool static LookupIntern(const char *pszName, std::vector<CNetAddr>& vIP, int nMaxSolutions, bool fAllowLookup)
+bool static LookupIntern(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions, bool fAllowLookup)
 {
     vIP.clear();
     struct addrinfo aiHint;
@@ -77,7 +77,7 @@ bool static LookupIntern(const char *pszName, std::vector<CNetAddr>& vIP, int nM
     return (vIP.size() > 0);
 }
 
-bool LookupHost(const char *pszName, std::vector<CNetAddr>& vIP, int nMaxSolutions, bool fAllowLookup)
+bool LookupHost(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions, bool fAllowLookup)
 {
     if (pszName[0] == 0)
         return false;
@@ -93,12 +93,12 @@ bool LookupHost(const char *pszName, std::vector<CNetAddr>& vIP, int nMaxSolutio
     return LookupIntern(pszHost, vIP, nMaxSolutions, fAllowLookup);
 }
 
-bool LookupHostNumeric(const char *pszName, std::vector<CNetAddr>& vIP, int nMaxSolutions)
+bool LookupHostNumeric(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions)
 {
     return LookupHost(pszName, vIP, nMaxSolutions, false);
 }
 
-bool Lookup(const char *pszName, std::vector<CService>& vAddr, int portDefault, bool fAllowLookup, int nMaxSolutions)
+bool Lookup(const char *pszName, std::vector<CService>& vAddr, int portDefault, bool fAllowLookup, unsigned int nMaxSolutions)
 {
     if (pszName[0] == 0)
         return false;
diff --git a/src/netbase.h b/src/netbase.h
index 9e79de425..6a257cf9f 100644
--- a/src/netbase.h
+++ b/src/netbase.h
@@ -134,10 +134,10 @@ class CService : public CNetAddr
             )
 };
 
-bool LookupHost(const char *pszName, std::vector<CNetAddr>& vIP, int nMaxSolutions = 0, bool fAllowLookup = true);
-bool LookupHostNumeric(const char *pszName, std::vector<CNetAddr>& vIP, int nMaxSolutions = 0);
+bool LookupHost(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions = 0, bool fAllowLookup = true);
+bool LookupHostNumeric(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions = 0);
 bool Lookup(const char *pszName, CService& addr, int portDefault = 0, bool fAllowLookup = true);
-bool Lookup(const char *pszName, std::vector<CService>& vAddr, int portDefault = 0, bool fAllowLookup = true, int nMaxSolutions = 0);
+bool Lookup(const char *pszName, std::vector<CService>& vAddr, int portDefault = 0, bool fAllowLookup = true, unsigned int nMaxSolutions = 0);
 bool LookupNumeric(const char *pszName, CService& addr, int portDefault = 0);
 bool ConnectSocket(const CService &addr, SOCKET& hSocketRet, int nTimeout = nConnectTimeout);