diff --git a/include/functions b/include/functions
index 7cbe476d..e45e5ae8 100644
--- a/include/functions
+++ b/include/functions
@@ -689,8 +689,13 @@
         LogText "Action: Performing plugin tests"
       }
 
-    # Is a process running?
-    # Returns: RUNNING
+    ################################################################################
+    # Name        : IsRunning()
+    # Description : Check if a process is running
+    # Returns     : 0 (process is running), 1 (process not running)
+    #               RUNNING (1 = running, 0 = not running)
+    ################################################################################
+
     IsRunning()
       {
         RUNNING=0
@@ -700,8 +705,10 @@
         if [ ! "${FIND}" = "" ]; then
             RUNNING=1
             LogText "IsRunning: process '$1' found (${FIND})"
+            return 0
           else
             LogText "IsRunning: process '$1' not found"
+            return 1
         fi
       }