diff --git a/dlls/wininet/ftp.c b/dlls/wininet/ftp.c
index ebb6d391f82..791459edfe2 100644
--- a/dlls/wininet/ftp.c
+++ b/dlls/wininet/ftp.c
@@ -2439,7 +2439,9 @@ HINTERNET FTP_Connect(LPWININETAPPINFOW hIC, LPCWSTR lpszServerName,
     SendAsyncCallback(&hIC->hdr, dwContext, INTERNET_STATUS_RESOLVING_NAME,
         (LPWSTR) lpszServerName, strlenW(lpszServerName));
 
-    if (!GetAddress(lpszServerName, nServerPort, &socketAddr))
+    sock_namelen = sizeof(socketAddr);
+    if (!GetAddress(lpszServerName, nServerPort,
+        (struct sockaddr *)&socketAddr, &sock_namelen))
     {
 	INTERNET_SetLastError(ERROR_INTERNET_NAME_NOT_RESOLVED);
         goto lerror;
diff --git a/dlls/wininet/http.c b/dlls/wininet/http.c
index 1b8d585521a..4ff4be7c8b7 100644
--- a/dlls/wininet/http.c
+++ b/dlls/wininet/http.c
@@ -1452,14 +1452,16 @@ static BOOL HTTP_ResolveName(LPWININETHTTPREQW lpwhr)
 {
     char szaddr[32];
     LPWININETHTTPSESSIONW lpwhs = lpwhr->lpHttpSession;
+    socklen_t sa_len;
 
     INTERNET_SendCallback(&lpwhr->hdr, lpwhr->hdr.dwContext,
                           INTERNET_STATUS_RESOLVING_NAME,
                           lpwhs->lpszServerName,
                           strlenW(lpwhs->lpszServerName)+1);
 
+    sa_len = sizeof(lpwhs->socketAddress);
     if (!GetAddress(lpwhs->lpszServerName, lpwhs->nServerPort,
-                    &lpwhs->socketAddress))
+                    (struct sockaddr *)&lpwhs->socketAddress, &sa_len))
     {
         INTERNET_SetLastError(ERROR_INTERNET_NAME_NOT_RESOLVED);
         return FALSE;
diff --git a/dlls/wininet/internet.c b/dlls/wininet/internet.c
index 3d87a735504..b1def60ece9 100644
--- a/dlls/wininet/internet.c
+++ b/dlls/wininet/internet.c
@@ -2750,14 +2750,15 @@ BOOL WINAPI InternetCheckConnectionW( LPCWSTR lpszUrl, DWORD dwFlags, DWORD dwRe
   if (dwFlags & FLAG_ICC_FORCE_CONNECTION)
   {
       struct sockaddr_in sin;
+      socklen_t sa_len = sizeof(sin);
       int fd;
 
-      if (!GetAddress(hostW, port, &sin))
+      if (!GetAddress(hostW, port, (struct sockaddr *)&sin, &sa_len))
           goto End;
       fd = socket(sin.sin_family, SOCK_STREAM, 0);
       if (fd != -1)
       {
-          if (connect(fd, (struct sockaddr *)&sin, sizeof(sin)) == 0)
+          if (connect(fd, (struct sockaddr *)&sin, sa_len) == 0)
               rc = TRUE;
           close(fd);
       }
diff --git a/dlls/wininet/internet.h b/dlls/wininet/internet.h
index e01e8de68f9..53e971512a1 100644
--- a/dlls/wininet/internet.h
+++ b/dlls/wininet/internet.h
@@ -381,7 +381,7 @@ HINTERNET HTTP_Connect(LPWININETAPPINFOW hIC, LPCWSTR lpszServerName,
 	DWORD dwInternalFlags);
 
 BOOL GetAddress(LPCWSTR lpszServerName, INTERNET_PORT nServerPort,
-	struct sockaddr_in *psa);
+	struct sockaddr *psa, socklen_t *sa_len);
 
 void INTERNET_SetLastError(DWORD dwError);
 DWORD INTERNET_GetLastError(void);
diff --git a/dlls/wininet/utility.c b/dlls/wininet/utility.c
index 5afdeb29667..2c443bffdec 100644
--- a/dlls/wininet/utility.c
+++ b/dlls/wininet/utility.c
@@ -145,7 +145,7 @@ time_t ConvertTimeString(LPCWSTR asctime)
 
 
 BOOL GetAddress(LPCWSTR lpszServerName, INTERNET_PORT nServerPort,
-	struct sockaddr_in *psa)
+	struct sockaddr *psa, socklen_t *sa_len)
 {
     WCHAR *found;
     char *name;
@@ -155,6 +155,7 @@ BOOL GetAddress(LPCWSTR lpszServerName, INTERNET_PORT nServerPort,
     int ret;
 #else
     struct hostent *phe;
+    struct sockaddr_in *sin = (struct sockaddr_in *)psa;
 #endif
 
     TRACE("%s\n", debugstr_w(lpszServerName));
@@ -186,10 +187,17 @@ BOOL GetAddress(LPCWSTR lpszServerName, INTERNET_PORT nServerPort,
         TRACE("failed to get address of %s (%s)\n", debugstr_w(lpszServerName), gai_strerror(ret));
         return FALSE;
     }
+    if (*sa_len < sizeof(struct sockaddr_in))
+    {
+        WARN("address too small\n");
+        freeaddrinfo( res );
+        return FALSE;
+    }
+    *sa_len = sizeof(struct sockaddr_in);
     memset( psa, 0, sizeof(struct sockaddr_in) );
-    memcpy( &psa->sin_addr, &((struct sockaddr_in *)res->ai_addr)->sin_addr, sizeof(struct in_addr) );
-    psa->sin_family = res->ai_family;
-    psa->sin_port = htons(nServerPort);
+    memcpy( &((struct sockaddr_in *)psa)->sin_addr, &((struct sockaddr_in *)res->ai_addr)->sin_addr, sizeof(struct in_addr) );
+    ((struct sockaddr_in *)psa)->sin_family = res->ai_family;
+    ((struct sockaddr_in *)psa)->sin_port = htons(nServerPort);
 
     freeaddrinfo( res );
 #else
@@ -203,10 +211,17 @@ BOOL GetAddress(LPCWSTR lpszServerName, INTERNET_PORT nServerPort,
         LeaveCriticalSection( &cs_gethostbyname );
         return FALSE;
     }
-    memset(psa,0,sizeof(struct sockaddr_in));
-    memcpy((char *)&psa->sin_addr, phe->h_addr, phe->h_length);
-    psa->sin_family = phe->h_addrtype;
-    psa->sin_port = htons(nServerPort);
+    if (*sa_len < sizeof(struct sockaddr_in))
+    {
+        WARN("address too small\n");
+        LeaveCriticalSection( &cs_gethostbyname );
+        return FALSE;
+    }
+    *sa_len = sizeof(struct sockaddr_in);
+    memset(sin,0,sizeof(struct sockaddr_in));
+    memcpy((char *)&sin->sin_addr, phe->h_addr, phe->h_length);
+    sin->sin_family = phe->h_addrtype;
+    sin->sin_port = htons(nServerPort);
 
     LeaveCriticalSection( &cs_gethostbyname );
 #endif