diff --git a/resources/systems/unix/es_find_rules.xml b/resources/systems/unix/es_find_rules.xml
index 73504e25f..d0d365420 100644
--- a/resources/systems/unix/es_find_rules.xml
+++ b/resources/systems/unix/es_find_rules.xml
@@ -477,6 +477,12 @@
             <entry>~/bin/sdl2trs/sdl2trs</entry>
         </rule>
     </emulator>
+    <emulator name="SHADPS4">
+        <!-- Sony PlayStation 4 emulator SHADPS4 RetroDECK -->
+        <rule type="systempath">
+            <entry>shadps4</entry>
+        </rule>
+    </emulator>
     <emulator name="SHEEPSHAVER">
         <!-- Apple Macintosh PowerPC emulator SheepShaver -->
         <rule type="systempath">
diff --git a/resources/systems/unix/es_systems.xml b/resources/systems/unix/es_systems.xml
index a160aa099..a7c003b64 100644
--- a/resources/systems/unix/es_systems.xml
+++ b/resources/systems/unix/es_systems.xml
@@ -1551,8 +1551,8 @@
         <name>ps4</name>
         <fullname>Sony PlayStation 4</fullname>
         <path>%ROMPATH%/ps4</path>
-        <extension>.7z .7Z .zip .ZIP</extension>
-        <command>PLACEHOLDER %ROM%</command>
+        <extension>.pkg .PKG</extension>
+        <command label="SHADPS4">%EMULATOR_SHADPS4% %ROM%</command>
         <platform>ps4</platform>
         <theme>ps4</theme>
     </system>