diff --git a/dist/deb/gnome/debian.control b/dist/deb/gnome/debian.control
index 9c85eba..d81ce14 100644
--- a/dist/deb/gnome/debian.control
+++ b/dist/deb/gnome/debian.control
@@ -2,7 +2,7 @@ Source: systray-x-gnome
 Section: misc
 Priority: optional
 Maintainer: Maxime Rijnders <ximi.obs@gmail.com>
-Build-Depends: debhelper (>= 4.1.16), zip, libqt5-opensource-5.14.2-minimal-static, thunderbird
+Build-Depends: debhelper (>= 4.1.16), zip, libx11-dev, libqt5-opensource-5.14.2-minimal-static, thunderbird
 
 Package: systray-x-gnome
 Architecture: any
diff --git a/dist/deb/gnome/systray-x-gnome.dsc b/dist/deb/gnome/systray-x-gnome.dsc
index b219256..d233705 100644
--- a/dist/deb/gnome/systray-x-gnome.dsc
+++ b/dist/deb/gnome/systray-x-gnome.dsc
@@ -4,4 +4,4 @@ Version: 0
 Binary: systray-x-gnome
 Maintainer: Maxime Rijnders <ximi.obs@gmail.com>
 Architecture: any
-Build-Depends: debhelper (>= 4.1.16), zip, libqt5-opensource-5.14.2-minimal-static, thunderbird
+Build-Depends: debhelper (>= 4.1.16), zip, libx11-dev, libqt5-opensource-5.14.2-minimal-static, thunderbird
diff --git a/dist/deb/kde/debian.control b/dist/deb/kde/debian.control
index 23c5935..923e92e 100644
--- a/dist/deb/kde/debian.control
+++ b/dist/deb/kde/debian.control
@@ -2,7 +2,7 @@ Source: systray-x
 Section: misc
 Priority: optional
 Maintainer: Maxime Rijnders <ximi.obs@gmail.com>
-Build-Depends: debhelper (>= 4.1.16), zip, libqt5-opensource-5.14.2-minimal-static, thunderbird
+Build-Depends: debhelper (>= 4.1.16), zip, libx11-dev, libqt5-opensource-5.14.2-minimal-static, thunderbird
 
 Package: systray-x
 Architecture: any
diff --git a/dist/deb/kde/systray-x.dsc b/dist/deb/kde/systray-x.dsc
index ed937f4..066c4a1 100644
--- a/dist/deb/kde/systray-x.dsc
+++ b/dist/deb/kde/systray-x.dsc
@@ -4,4 +4,4 @@ Version: 0
 Binary: SysTray-X
 Maintainer: Maxime Rijnders <ximi.obs@gmail.com>
 Architecture: any
-Build-Depends: debhelper (>= 4.1.16), zip, libqt5-opensource-5.14.2-minimal-static, thunderbird
+Build-Depends: debhelper (>= 4.1.16), zip, libx11-dev, libqt5-opensource-5.14.2-minimal-static, thunderbird
diff --git a/dist/rpm/gnome/systray-x-gnome.spec b/dist/rpm/gnome/systray-x-gnome.spec
index 50070ed..bfb43ab 100644
--- a/dist/rpm/gnome/systray-x-gnome.spec
+++ b/dist/rpm/gnome/systray-x-gnome.spec
@@ -27,6 +27,7 @@ Source1:        VERSION
 BuildRequires:  unzip
 BuildRequires:  zip
 BuildRequires:  gcc-c++
+BuildRequires:  libX11-devel
 BuildRequires:  libqt5-opensource-5.14.2-minimal-static
 Requires:       gnome-shell-extension-appindicator
 %if 0%{?fedora_version}
diff --git a/dist/rpm/kde/systray-x.spec b/dist/rpm/kde/systray-x.spec
index 9c55bcc..5fd741b 100644
--- a/dist/rpm/kde/systray-x.spec
+++ b/dist/rpm/kde/systray-x.spec
@@ -27,6 +27,7 @@ Source1:        VERSION
 BuildRequires:  unzip
 BuildRequires:  zip
 BuildRequires:  gcc-c++
+BuildRequires:  libX11-devel
 BuildRequires:  libqt5-opensource-5.14.2-minimal-static
 %if 0%{?fedora_version}
 Requires:       thunderbird >= 68