diff --git a/CMakeLists.txt b/CMakeLists.txt
index 36be5312d..fa3f82912 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,6 +20,8 @@ include(KDEClangFormat)
 include(KDECMakeSettings)
 include(KDECompilerSettings NO_POLICY_SCOPE)
 
+include(cmake/Flatpak.cmake)
+
 # Fix a crash due to problems with quotient's event system. Can probably be removed once the reworked event system is in
 cmake_policy(SET CMP0063 OLD)
 
diff --git a/cmake/Flatpak.cmake b/cmake/Flatpak.cmake
new file mode 100644
index 000000000..3262a7dbd
--- /dev/null
+++ b/cmake/Flatpak.cmake
@@ -0,0 +1,16 @@
+if(NOT NEOCHAT_FLATPAK)
+    # Only include this if we build a Flatpak
+    return()
+endif()
+
+include(GNUInstallDirs)
+
+# Include FontConfig config which uses the Emoji One font from the
+# KDE Flatpak SDK.
+install(
+    FILES
+        ${CMAKE_CURRENT_SOURCE_DIR}/cmake/Flatpak/99-noto-mono-color-emoji.conf
+    DESTINATION
+        ${CMAKE_INSTALL_SYSCONFDIR}/fonts/conf.d/
+)
+
diff --git a/cmake/Flatpak/99-noto-mono-color-emoji.conf b/cmake/Flatpak/99-noto-mono-color-emoji.conf
new file mode 100644
index 000000000..386b890e3
--- /dev/null
+++ b/cmake/Flatpak/99-noto-mono-color-emoji.conf
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
+<fontconfig>
+  <alias>
+    <family>serif</family>
+    <prefer>
+      <family>Emoji One</family>
+    </prefer>
+  </alias>
+  <alias>
+    <family>sans-serif</family>
+    <prefer>
+      <family>Emoji One</family>
+    </prefer>
+  </alias>
+  <alias>
+    <family>monospace</family>
+    <prefer>
+      <family>Emoji One</family>
+    </prefer>
+  </alias>
+</fontconfig>
+
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 22b75f77f..2e2cd05b4 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -28,6 +28,10 @@ target_include_directories(neochat PRIVATE ${CMAKE_BINARY_DIR})
 target_link_libraries(neochat PRIVATE Qt5::Quick Qt5::Qml Qt5::Gui Qt5::Network Qt5::QuickControls2 KF5::I18n KF5::Kirigami2 KF5::Notifications KF5::ConfigCore KF5::ConfigGui KF5::CoreAddons Quotient cmark::cmark)
 kconfig_add_kcfg_files(neochat GENERATE_MOC neochatconfig.kcfgc)
 
+if(NEOCHAT_FLATPAK)
+    target_compile_definitions(neochat PRIVATE NEOCHAT_FLATPAK)
+endif()
+
 if (KQuickImageEditor_FOUND)
     target_compile_definitions(neochat PRIVATE HAS_KQUICKIMAGEEDITOR)
 endif()
diff --git a/src/main.cpp b/src/main.cpp
index c9d6acdad..1633d8375 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -76,6 +76,13 @@ int main(int argc, char *argv[])
     KDBusService service(KDBusService::Unique);
 #endif
 
+#ifdef NEOCHAT_FLATPAK
+    // Copy over the included FontConfig configuration to the
+    // app's config dir:
+    QFile::copy("/app/etc/fonts/conf.d/99-noto-mono-color-emoji.conf",
+                "/var/config/fontconfig/conf.d/99-noto-mono-color-emoji.conf");
+#endif
+
     Clipboard clipboard;
     auto config = NeoChatConfig::self();