diff --git a/CHANGES b/CHANGES
index 37952c8d8..9f6e54a8b 100644
--- a/CHANGES
+++ b/CHANGES
@@ -6,6 +6,10 @@
 
                                   Changelog
 
+Daniel (4 March 2006)
+- Thomas Klausner provided a patch written by Todd Vierling in bug report
+  #1442471 that fixes a build problem on Interix.
+
 Daniel (2 March 2006)
 - FTP upload without a file name part in the URL now causes
   curl_easy_perform() to return CURLE_URL_MALFORMAT. Previously it allowed the
diff --git a/RELEASE-NOTES b/RELEASE-NOTES
index 0110cd571..a464efb42 100644
--- a/RELEASE-NOTES
+++ b/RELEASE-NOTES
@@ -15,6 +15,7 @@ This release includes the following changes:
 
 This release includes the following bugfixes:
 
+ o Interix build fix
  o fixed "hang" when out of file handles at start
 
 Other curl-related news since the previous public release:
@@ -24,6 +25,6 @@ Other curl-related news since the previous public release:
 This release would not have looked like this without help, code, reports and
 advice from friends like these:
 
- Gisle Vanem, Dan Fandrich
+ Gisle Vanem, Dan Fandrich, Thomas Klausner, Todd Vierling
 
         Thanks! (and sorry if I forgot to mention someone)
diff --git a/lib/if2ip.h b/lib/if2ip.h
index 4364b09d1..4e86e2b27 100644
--- a/lib/if2ip.h
+++ b/lib/if2ip.h
@@ -27,6 +27,8 @@
 extern char *Curl_if2ip(const char *interf, char *buf, int buf_size);
 
 #ifdef __INTERIX
+#include <sys/socket.h>
+
 /* Nedelcho Stanev's work-around for SFU 3.0 */
 struct ifreq {
 #define IFNAMSIZ 16