diff --git a/graphics/qgis-ltr/Makefile b/graphics/qgis-ltr/Makefile
index 8d88bdc043a6..bc803b7a8efb 100644
--- a/graphics/qgis-ltr/Makefile
+++ b/graphics/qgis-ltr/Makefile
@@ -1,6 +1,5 @@
 PORTNAME=	qgis
-DISTVERSION=	3.40.5
-PORTREVISION=	3
+DISTVERSION=	3.40.6
 CATEGORIES=	graphics geography
 MASTER_SITES=	https://qgis.org/downloads/
 PKGNAMESUFFIX=	-ltr
diff --git a/graphics/qgis-ltr/distinfo b/graphics/qgis-ltr/distinfo
index 08f1e550bffd..d3e4d7b720fc 100644
--- a/graphics/qgis-ltr/distinfo
+++ b/graphics/qgis-ltr/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1742723541
-SHA256 (qgis-3.40.5.tar.bz2) = 4a71ffb6374656e130f2c22e5e5e0d7302eb97659a7a34dcbf8ccf156edaa60e
-SIZE (qgis-3.40.5.tar.bz2) = 182472461
+TIMESTAMP = 1745126800
+SHA256 (qgis-3.40.6.tar.bz2) = dd68d39a2a29326031195bed2125e8b0fa7112fe9ee74d5f9850d06b02cef6a8
+SIZE (qgis-3.40.6.tar.bz2) = 182776341
diff --git a/graphics/qgis-ltr/files/patch-src_server_qgsfcgiserverresponse.cpp b/graphics/qgis-ltr/files/patch-src_server_qgsfcgiserverresponse.cpp
new file mode 100644
index 000000000000..102965e15b47
--- /dev/null
+++ b/graphics/qgis-ltr/files/patch-src_server_qgsfcgiserverresponse.cpp
@@ -0,0 +1,24 @@
+--- src/server/qgsfcgiserverresponse.cpp.orig	2025-04-18 12:00:43 UTC
++++ src/server/qgsfcgiserverresponse.cpp
+@@ -31,6 +31,7 @@
+ #include <sys/types.h>
+ #include <sys/socket.h>
+ #include <chrono>
++#include <pthread_np.h>
+ 
+ //
+ // QgsFCGXStreamData copied from libfcgi FCGX_Stream_Data
+@@ -114,7 +115,12 @@ void QgsSocketMonitoringThread::run()
+   }
+ 
+ #if defined( Q_OS_UNIX ) && !defined( Q_OS_ANDROID )
+-  const pid_t threadId = gettid();
++  // https://github.com/qgis/QGIS/commit/6ecc1c31c95894199b88b56f8023e74807743957
++  #if !defined (__FreeBSD__)
++    const pid_t threadId = gettid();
++  #else
++    const pid_t threadId = pthread_getthreadid_np();
++  #endif
+ 
+   char c;
+