diff --git a/pkg/agent/loop.go b/pkg/agent/loop.go
index 0f1519910..88afa6119 100644
--- a/pkg/agent/loop.go
+++ b/pkg/agent/loop.go
@@ -1119,18 +1119,12 @@ func (al *AgentLoop) forceCompression(agent *AgentInstance, sessionKey string) {
 
 	// Append compression note to the original system prompt instead of adding a new system message
 	// This avoids having two consecutive system messages which some APIs (like Zhipu) reject
-	// Also avoid duplicate compression notes - check if already present
+	compressionNote := fmt.Sprintf(
+		"\n\n[System Note: Emergency compression dropped %d oldest messages due to context limit]",
+		droppedCount,
+	)
 	enhancedSystemPrompt := history[0]
-	systemContent := enhancedSystemPrompt.Content
-	// Check if compression already noted (avoid duplicate notes)
-	if !strings.Contains(systemContent, "[System Note: Emergency compression") {
-		compressionNote := fmt.Sprintf(
-			"\n\n[System Note: Emergency compression dropped %d oldest messages due to context limit]",
-			droppedCount,
-		)
-		systemContent = systemContent + compressionNote
-	}
-	enhancedSystemPrompt.Content = systemContent
+	enhancedSystemPrompt.Content = enhancedSystemPrompt.Content + compressionNote
 	newHistory = append(newHistory, enhancedSystemPrompt)
 
 	newHistory = append(newHistory, keptConversation...)