diff --git a/src/platform/StdSchedulerWin32.cpp b/src/platform/StdSchedulerWin32.cpp
index 088801739..b130c4756 100644
--- a/src/platform/StdSchedulerWin32.cpp
+++ b/src/platform/StdSchedulerWin32.cpp
@@ -84,14 +84,17 @@ bool StdScheduler::DoScheduleProcs(int iTimeout)
 	}
 
 	// Execute all processes with timeout
+	// Iterate over the index because procedures may be added or removed during execution
+	// (If they are removed, we skip one execution, which doesn't really matter in practice)
 	auto tNow = C4TimeMilliseconds::Now();
-	for (auto proc = procs.begin(); proc != procs.end(); ++proc)
+	for (size_t i_proc = 0u; i_proc < procs.size(); ++i_proc)
 	{
-		auto tProcTick = (*proc)->GetNextTick(tNow);
+		StdSchedulerProc *proc = procs[i_proc];
+		auto tProcTick = proc->GetNextTick(tNow);
 		if (tProcTick <= tNow)
-			if (!(*proc)->Execute(0))
+			if (!proc->Execute(0))
 			{
-				OnError(*proc);
+				OnError(proc);
 				fSuccess = false;
 			}
 	}