diff --git a/60-openrgb.rules b/60-openrgb.rules
index 28ea79ce..9f17130a 100644
--- a/60-openrgb.rules
+++ b/60-openrgb.rules
@@ -748,7 +748,10 @@ SUBSYSTEMS=="usb", ATTR{idVendor}=="054c", ATTR{idProduct}=="0ba0", TAG+="uacces
 #       SteelSeries Apex OG                                     #
 #       SteelSeries Apex 350                                    #
 #  Mousemats:                                                   #
-#       SteelSeries QCK Prism Cloth                             #
+#       SteelSeries QCK Prism Cloth Medium                      #
+#       SteelSeries QCK Prism Cloth XL                          #
+#       SteelSeries QCK Prism Cloth 3XL                         #
+#       SteelSeries QCK Prism Cloth 4XL                         #
 #---------------------------------------------------------------#
 SUBSYSTEMS=="usb", ATTR{idVendor}=="1038", ATTR{idProduct}=="1702", TAG+="uaccess"
 SUBSYSTEMS=="usb", ATTR{idVendor}=="1038", ATTR{idProduct}=="170c", TAG+="uaccess"
@@ -786,6 +789,7 @@ SUBSYSTEMS=="usb", ATTR{idVendor}=="1038", ATTR{idProduct}=="1206", TAG+="uacces
 SUBSYSTEMS=="usb", ATTR{idVendor}=="1038", ATTR{idProduct}=="150a", TAG+="uaccess"
 SUBSYSTEMS=="usb", ATTR{idVendor}=="1038", ATTR{idProduct}=="150d", TAG+="uaccess"
 SUBSYSTEMS=="usb", ATTR{idVendor}=="1038", ATTR{idProduct}=="1516", TAG+="uaccess"
+SUBSYSTEMS=="usb", ATTR{idVendor}=="1038", ATTR{idProduct}=="1518", TAG+="uaccess"
 
 #---------------------------------------------------------------#
 #  Tecknet Devices                                              #
diff --git a/Controllers/SteelSeriesController/SteelSeriesControllerDetect.cpp b/Controllers/SteelSeriesController/SteelSeriesControllerDetect.cpp
index 6e25c2db..72045f50 100644
--- a/Controllers/SteelSeriesController/SteelSeriesControllerDetect.cpp
+++ b/Controllers/SteelSeriesController/SteelSeriesControllerDetect.cpp
@@ -59,6 +59,7 @@
 #define STEELSERIES_QCK_PRISM_CLOTH_MED_PID         0x150A
 #define STEELSERIES_QCK_PRISM_CLOTH_XL_PID          0x150D
 #define STEELSERIES_QCK_PRISM_CLOTH_3XL_PID         0x1516
+#define STEELSERIES_QCK_PRISM_CLOTH_4XL_PID         0x1518
 /*-----------------------------------------------------*\
 | Keyboard product IDs                                  |
 \*-----------------------------------------------------*/
@@ -253,6 +254,7 @@ REGISTER_HID_DETECTOR_I("SteelSeries Siberia 350",                          Dete
 REGISTER_HID_DETECTOR_I("SteelSeries QCK Prism Cloth Medium",                DetectSteelSeriesMousemat,  STEELSERIES_VID, STEELSERIES_QCK_PRISM_CLOTH_MED_PID,      0  );
 REGISTER_HID_DETECTOR_I("SteelSeries QCK Prism Cloth XL",                    DetectSteelSeriesMousemat,  STEELSERIES_VID, STEELSERIES_QCK_PRISM_CLOTH_XL_PID,       0  );
 REGISTER_HID_DETECTOR_I("SteelSeries QCK Prism Cloth 3XL",                   DetectSteelSeriesMousemat,  STEELSERIES_VID, STEELSERIES_QCK_PRISM_CLOTH_3XL_PID,      0  );
+REGISTER_HID_DETECTOR_I("SteelSeries QCK Prism Cloth 4XL",                   DetectSteelSeriesMousemat,  STEELSERIES_VID, STEELSERIES_QCK_PRISM_CLOTH_4XL_PID,      0  );
 /*---------------------------------------------------------------------------------------------------------------------------------------------------------------------*\
 | Keyboards                                                                                                                                                             |
 \*---------------------------------------------------------------------------------------------------------------------------------------------------------------------*/