diff --git a/components/ratgdo/ratgdo.cpp b/components/ratgdo/ratgdo.cpp
index 4b9b38c..a11632a 100644
--- a/components/ratgdo/ratgdo.cpp
+++ b/components/ratgdo/ratgdo.cpp
@@ -128,12 +128,12 @@ namespace ratgdo {
         }
     }
 
-    void IRAM_ATTR HOT RATGDOStore::isrObstruction()
+    void IRAM_ATTR HOT RATGDOStore::isrObstruction(RATGDOStore *arg)
     {
 		if (this->input_obst.digital_read()) {
             arg->lastObstructionHigh = millis();
         } else {
-            this->obstructionLowCount++;
+            arg->obstructionLowCount++;
         }
     }