diff --git a/extensions/globaltimers.c b/extensions/globaltimers.c
index 1d8092f..8de97ce 100644
--- a/extensions/globaltimers.c
+++ b/extensions/globaltimers.c
@@ -52,11 +52,14 @@ void cGlobalTimers::MarkLocalTimers(void) {
         delete[] localTimer;
         localTimer = NULL;
     }
+    const cTimers* timers;
 #if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    {
     LOCK_TIMERS_READ;
-    const cTimers* timers = Timers;
+    timers = Timers;
+    }
 #else
-    const cTimers* timers = &Timers;
+    timers = &Timers;
 #endif
     int numTimers = Size();
     if (numTimers > 0) {
@@ -78,14 +81,17 @@ void cGlobalTimers::MarkLocalTimers(void) {
 }
 
 void cGlobalTimers::SetLocalTimers(void) {
+    const cTimers* timers;
 #if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    {
     LOCK_TIMERS_READ;
-    const cTimers* timers = Timers;
+    timers = Timers;
+    }
 #else
-    const cTimers* timers = &Timers;
+    timers = &Timers;
 #endif
     for (const cTimer *Timer = timers->First(); Timer; Timer = timers->Next(Timer)) {
-        if (Timer->HasFlags(tfActive))
+        if (Timer && Timer->HasFlags(tfActive))
             Append(Timer);
     }    
 }