diff --git a/resources/systems/unix/es_find_rules.xml b/resources/systems/unix/es_find_rules.xml
index 0e064c73b..4b314bc57 100644
--- a/resources/systems/unix/es_find_rules.xml
+++ b/resources/systems/unix/es_find_rules.xml
@@ -421,6 +421,17 @@
             <entry>~/bin/redream/redream</entry>
         </rule>
     </emulator>
+    <emulator name="ROSALIES-MUPEN-GUI">
+        <!-- Nintendo 64 emulator Rosalie's Mupen GUI -->
+        <rule type="systempath">
+            <entry>RMG</entry>
+            <entry>com.github.Rosalie241.RMG</entry>
+        </rule>
+        <rule type="staticpath">
+            <entry>/var/lib/flatpak/exports/bin/com.github.Rosalie241.RMG</entry>
+            <entry>~/.local/share/flatpak/exports/bin/com.github.Rosalie241.RMG</entry>
+        </rule>
+    </emulator>
     <emulator name="RPCS3">
         <!-- Sony PlayStation 3 emulator RPCS3 -->
         <rule type="systempath">
diff --git a/resources/systems/unix/es_systems.xml b/resources/systems/unix/es_systems.xml
index 032eca661..5670c5f40 100644
--- a/resources/systems/unix/es_systems.xml
+++ b/resources/systems/unix/es_systems.xml
@@ -882,6 +882,7 @@
         <command label="Mupen64Plus (Standalone)">%EMULATOR_MUPEN64PLUS% --nogui %ROM%</command>
         <command label="ParaLLEl N64">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%/parallel_n64_libretro.so %ROM%</command>
         <command label="simple64 (Standalone)">%EMULATOR_SIMPLE64% --nogui %ROM%</command>
+        <command label="Rosalie's Mupen GUI (Standalone)">%EMULATOR_ROSALIES-MUPEN-GUI% %ROM%</command>
         <command label="ares (Standalone)">%EMULATOR_ARES% --fullscreen --system "Nintendo 64" %ROM%</command>
         <platform>n64</platform>
         <theme>n64</theme>