diff -rup a/configure.ac b/configure.ac
--- a/configure.ac	2024-05-28 23:17:26.000000000 +0200
+++ b/configure.ac	2024-05-29 09:30:19.333885138 +0200
@@ -58,7 +58,7 @@ dnl ***********************************
 XDT_CHECK_OPTIONAL_FEATURE([X11],
                            [x11],
                            [
-                             XDT_FEATURE_DEPENDENCY([LIBX11], [x11], [1.6.7])
+                             XDT_FEATURE_DEPENDENCY([LIBX11], [x11], [1.6.5])
                              XDT_FEATURE_DEPENDENCY([GDKX11], [gdk-x11-3.0], [3.24.0])
                              XDT_FEATURE_DEPENDENCY([XINPUT2], [xi], [1.7.8])
                              XDT_FEATURE_DEPENDENCY([LIBXEXT], [xext], [1.0.0])
diff -rup a/config.h.in b/config.h.in
--- a/config.h.in	2024-05-28 23:24:00.000000000 +0200
+++ b/config.h.in	2024-05-29 09:30:25.267216340 +0200
@@ -58,7 +58,7 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
-/* Define if x11 >= 1.6.7 present */
+/* Define if x11 >= 1.6.5 present */
 #undef HAVE_LIBX11
 
 /* Define if xext >= 1.0.0 present */
diff -rup a/configure b/configure
--- a/configure	2024-05-28 23:24:00.000000000 +0200
+++ b/configure	2024-05-29 09:31:02.307203033 +0200
@@ -15569,11 +15569,11 @@ fi
 
 
   if test x"$xdt_feature_deps_check_only" = x"yes"; then
-    if ! $PKG_CONFIG --exists "x11 >= 1.6.7" >/dev/null 2>&1; then
+    if ! $PKG_CONFIG --exists "x11 >= 1.6.5" >/dev/null 2>&1; then
       if test x"$xdt_feature_deps_missing" = x""; then
-        xdt_feature_deps_missing="x11 >= 1.6.7"
+        xdt_feature_deps_missing="x11 >= 1.6.5"
       else
-        xdt_feature_deps_missing="$xdt_feature_deps_missing, x11 >= 1.6.7"
+        xdt_feature_deps_missing="$xdt_feature_deps_missing, x11 >= 1.6.5"
       fi
     fi
   else
@@ -15727,9 +15727,9 @@ fi
 
 
 
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for x11 >= 1.6.7" >&5
-printf %s "checking for x11 >= 1.6.7... " >&6; }
-  if $PKG_CONFIG "--atleast-version=1.6.7" "x11" >/dev/null 2>&1; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for x11 >= 1.6.5" >&5
+printf %s "checking for x11 >= 1.6.5... " >&6; }
+  if $PKG_CONFIG "--atleast-version=1.6.5" "x11" >/dev/null 2>&1; then
     LIBX11_VERSION=`$PKG_CONFIG --modversion "x11"`
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $LIBX11_VERSION" >&5
 printf "%s\n" "$LIBX11_VERSION" >&6; }
@@ -15746,7 +15746,7 @@ printf %s "checking LIBX11_LIBS... " >&6
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $LIBX11_LIBS" >&5
 printf "%s\n" "$LIBX11_LIBS" >&6; }
 
-    LIBX11_REQUIRED_VERSION=1.6.7
+    LIBX11_REQUIRED_VERSION=1.6.5
 
 
 
@@ -15775,7 +15775,7 @@ printf "%s\n" "found, but $xdt_cv_versio
 
       echo "*** The required package x11 was found on your system,"
       echo "*** but the installed version ($xdt_cv_version) is too old."
-      echo "*** Please upgrade x11 to atleast version 1.6.7, or adjust"
+      echo "*** Please upgrade x11 to atleast version 1.6.5, or adjust"
       echo "*** the PKG_CONFIG_PATH environment variable if you installed"
       echo "*** the new version of the package in a nonstandard prefix so"
       echo "*** pkg-config is able to find it."
@@ -15787,7 +15787,7 @@ printf "%s\n" "not found" >&6; }
 
 
       echo "*** The required package x11 was not found on your system."
-      echo "*** Please install x11 (atleast version 1.6.7) or adjust"
+      echo "*** Please install x11 (atleast version 1.6.5) or adjust"
       echo "*** the PKG_CONFIG_PATH environment variable if you"
       echo "*** installed the package in a nonstandard prefix so that"
       echo "*** pkg-config is able to find it."
@@ -16733,11 +16733,11 @@ printf "%s\n" "not found" >&6; }
 
 
   if test x"$xdt_feature_deps_check_only" = x"yes"; then
-    if ! $PKG_CONFIG --exists "x11 >= 1.6.7" >/dev/null 2>&1; then
+    if ! $PKG_CONFIG --exists "x11 >= 1.6.5" >/dev/null 2>&1; then
       if test x"$xdt_feature_deps_missing" = x""; then
-        xdt_feature_deps_missing="x11 >= 1.6.7"
+        xdt_feature_deps_missing="x11 >= 1.6.5"
       else
-        xdt_feature_deps_missing="$xdt_feature_deps_missing, x11 >= 1.6.7"
+        xdt_feature_deps_missing="$xdt_feature_deps_missing, x11 >= 1.6.5"
       fi
     fi
   else
@@ -16891,9 +16891,9 @@ fi
 
 
 
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for x11 >= 1.6.7" >&5
-printf %s "checking for x11 >= 1.6.7... " >&6; }
-  if $PKG_CONFIG "--atleast-version=1.6.7" "x11" >/dev/null 2>&1; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for x11 >= 1.6.5" >&5
+printf %s "checking for x11 >= 1.6.5... " >&6; }
+  if $PKG_CONFIG "--atleast-version=1.6.5" "x11" >/dev/null 2>&1; then
     LIBX11_VERSION=`$PKG_CONFIG --modversion "x11"`
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $LIBX11_VERSION" >&5
 printf "%s\n" "$LIBX11_VERSION" >&6; }
@@ -16910,7 +16910,7 @@ printf %s "checking LIBX11_LIBS... " >&6
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $LIBX11_LIBS" >&5
 printf "%s\n" "$LIBX11_LIBS" >&6; }
 
-    LIBX11_REQUIRED_VERSION=1.6.7
+    LIBX11_REQUIRED_VERSION=1.6.5
 
 
 
@@ -16939,7 +16939,7 @@ printf "%s\n" "found, but $xdt_cv_versio
 
       echo "*** The required package x11 was found on your system,"
       echo "*** but the installed version ($xdt_cv_version) is too old."
-      echo "*** Please upgrade x11 to atleast version 1.6.7, or adjust"
+      echo "*** Please upgrade x11 to atleast version 1.6.5, or adjust"
       echo "*** the PKG_CONFIG_PATH environment variable if you installed"
       echo "*** the new version of the package in a nonstandard prefix so"
       echo "*** pkg-config is able to find it."
@@ -16951,7 +16951,7 @@ printf "%s\n" "not found" >&6; }
 
 
       echo "*** The required package x11 was not found on your system."
-      echo "*** Please install x11 (atleast version 1.6.7) or adjust"
+      echo "*** Please install x11 (atleast version 1.6.5) or adjust"
       echo "*** the PKG_CONFIG_PATH environment variable if you"
       echo "*** installed the package in a nonstandard prefix so that"
       echo "*** pkg-config is able to find it."