diff --git a/ffinstall.nsi b/ffinstall.nsi
index f483b0174f..d3198a04eb 100644
--- a/ffinstall.nsi
+++ b/ffinstall.nsi
@@ -32,7 +32,7 @@ Section "Install"
   File ".\ffplay.exe"
   File ".\COPYING"
   File ".\CREDITS"
-  
+
   ; documentation
   SetOutPath $INSTDIR\doc
   File ".\doc\faq.html"
@@ -58,7 +58,7 @@ Section Uninstall
   Delete "$INSTDIR\ffplay.exe"
   Delete "$INSTDIR\COPYING"
   Delete "$INSTDIR\CREDITS"
-  
+
   ; delete documentation
   Delete "$INSTDIR\doc\faq.html"
   Delete "$INSTDIR\ffmpeg-doc.html"
diff --git a/ffserver.c b/ffserver.c
index 1c3a91e7e9..c34e47a93c 100644
--- a/ffserver.c
+++ b/ffserver.c
@@ -4281,7 +4281,7 @@ static int parse_ffconfig(const char *filename)
             }
 
             get_arg(arg, sizeof(arg), &p);
-	    
+
             if (resolve_host(&acl.first, arg) != 0) {
                 fprintf(stderr, "%s:%d: ACL refers to invalid host or ip address '%s'\n",
                         filename, line_num, arg);
diff --git a/libavformat/os_support.c b/libavformat/os_support.c
index 9dddab2f15..da303be49c 100644
--- a/libavformat/os_support.c
+++ b/libavformat/os_support.c
@@ -105,12 +105,12 @@ done:
 int resolve_host(struct in_addr *sin_addr, const char *hostname)
 {
     struct hostent *hp;
-    
+
     if (!inet_aton(hostname, sin_addr)) {
-	hp = gethostbyname(hostname);
-	if (!hp)
-	    return -1;
-	memcpy(sin_addr, hp->h_addr, sizeof(struct in_addr));
+        hp = gethostbyname(hostname);
+        if (!hp)
+            return -1;
+        memcpy(sin_addr, hp->h_addr, sizeof(struct in_addr));
     }
     return 0;
 }