diff --git a/srcpkgs/libzen/files/proper-mt-fix.patch b/srcpkgs/libzen/files/proper-mt-fix.patch
index 1bfbcd3c903..df236c42262 100644
--- a/srcpkgs/libzen/files/proper-mt-fix.patch
+++ b/srcpkgs/libzen/files/proper-mt-fix.patch
@@ -39,72 +39,3 @@ index c0ff266..62a1bf5 100644
  dnl #########################################################################
  dnl ### Output
  dnl #########################################################################
-diff --git a/Source/ZenLib/Format/Http/Http_Cookies.cpp b/Source/ZenLib/Format/Http/Http_Cookies.cpp
-index 1345aa0..eb41690 100644
---- a/Source/ZenLib/Format/Http/Http_Cookies.cpp
-+++ b/Source/ZenLib/Format/Http/Http_Cookies.cpp
-@@ -86,7 +86,21 @@ void Cookies::Create_Lines(std::ostream& Out)
-         if (Cookie->second.Expires!=(time_t)-1)
-         {
-             char Temp[200];
--            if (strftime(Temp, 200, "%a, %d-%b-%Y %H:%M:%S GMT", gmtime(&Cookie->second.Expires)))
-+            #if defined(HAVE_GMTIME_R)
-+            struct tm Gmt_Temp;
-+            struct tm *Gmt=gmtime_r(&Cookie->second.Expires, &Gmt_Temp);
-+            #elif defined(_MSC_VER)
-+            struct tm Gmt_Temp;
-+            errno_t gmtime_s_Result=gmtime_s(&Gmt_Temp , &Cookie->second.Expires);
-+            struct tm* Gmt=gmtime_s_Result?NULL:&Gmt_Temp;
-+            #else
-+            #ifdef __GNUC__
-+            #warning "This version of ZenLib is not thread safe"
-+            #endif
-+            struct tm *Gmt=gmtime(&Cookie->second.Expires);
-+            #endif
-+
-+            if (strftime(Temp, 200, "%a, %d-%b-%Y %H:%M:%S GMT", Gmt))
-                 Out << "; expires=" << Temp;
-         }
-         if (!Cookie->second.Path.empty())
-diff --git a/Source/ZenLib/Ztring.cpp b/Source/ZenLib/Ztring.cpp
-index 6b705c3..069e001 100644
---- a/Source/ZenLib/Ztring.cpp
-+++ b/Source/ZenLib/Ztring.cpp
-@@ -1312,7 +1312,7 @@ Ztring& Ztring::Date_From_Seconds_1970 (const int32s Value)
- Ztring& Ztring::Date_From_Seconds_1970 (const int64s Value)
- {
-     time_t Time=(time_t)Value;
--    #if _POSIX_C_SOURCE >= 1 || _XOPEN_SOURCE || _BSD_SOURCE || _SVID_SOURCE || _POSIX_SOURCE
-+    #if defined(HAVE_GMTIME_R)
-     struct tm Gmt_Temp;
-     struct tm *Gmt=gmtime_r(&Time, &Gmt_Temp);
-     #elif defined(_MSC_VER)
-@@ -1320,6 +1320,9 @@ Ztring& Ztring::Date_From_Seconds_1970 (const int64s Value)
-     errno_t gmtime_s_Result=gmtime_s(&Gmt_Temp , &Time);
-     struct tm* Gmt=gmtime_s_Result?NULL:&Gmt_Temp;
-     #else
-+    #ifdef __GNUC__
-+    #warning "This version of ZenLib is not thread safe"
-+    #endif
-     struct tm *Gmt=gmtime(&Time);
-     #endif
-     if (!Gmt)
-@@ -1352,7 +1355,7 @@ Ztring& Ztring::Date_From_Seconds_1970 (const int64s Value)
- Ztring& Ztring::Date_From_Seconds_1970_Local (const int32u Value)
- {
-     time_t Time=(time_t)Value;
--    #if _POSIX_C_SOURCE >= 1 || _XOPEN_SOURCE || _BSD_SOURCE || _SVID_SOURCE || _POSIX_SOURCE
-+    #if defined(HAVE_LOCALTIME_R)
-     struct tm Gmt_Temp;
-     struct tm *Gmt=localtime_r(&Time, &Gmt_Temp);
-     #elif defined(_MSC_VER)
-@@ -1360,6 +1363,9 @@ Ztring& Ztring::Date_From_Seconds_1970_Local (const int32u Value)
-     errno_t localtime_s_Result=localtime_s(&Gmt_Temp , &Time);
-     struct tm* Gmt=localtime_s_Result?NULL:&Gmt_Temp;
-     #else
-+    #ifdef __GNUC__
-+    #warning "This version of ZenLib is not thread safe"
-+    #endif
-     struct tm *Gmt=localtime(&Time);
-     #endif
-     Ztring DateT;
diff --git a/srcpkgs/libzen/template b/srcpkgs/libzen/template
index 3f813f77f3d..50358bab67b 100644
--- a/srcpkgs/libzen/template
+++ b/srcpkgs/libzen/template
@@ -1,6 +1,6 @@
 # Template build file for 'libzen'.
 pkgname=libzen
-version=0.4.38
+version=0.4.40
 revision=1
 short_desc="Shared library for libmediainfo and mediainfo"
 homepage="http://mediaarea.net/MediaInfo"
@@ -8,7 +8,7 @@ maintainer="Georg Schabel <gescha@posteo.de>"
 license="zlib"
 
 distfiles="https://mediaarea.net/download/source/${pkgname}/${version}/${pkgname}_${version}.tar.gz"
-checksum=ad98fccec235ed76a40e7da8856f0bcc9c8d07cafe4c3ce30c47407760add786
+checksum=54d492552d97004d5323a9f1bdf397af4ffe20ae633c5f7874d073a21388c805
 
 build_style=gnu-configure
 hostmakedepends="automake libtool pkg-config"