diff --git a/MathTexvc.php b/MathTexvc.php
index 004469803..8b4f877b2 100644
--- a/MathTexvc.php
+++ b/MathTexvc.php
@@ -276,7 +276,7 @@ class MathTexvc extends MathRenderer {
 	 */
 	public function writeCache() {
 		global $wgUseSquid;
-		if ( $this->isRecall() ) {
+		if ( !$this->isRecall() ) {
 			return;
 		}
 		$this->writeDBEntry();
@@ -315,4 +315,4 @@ class MathTexvc extends MathRenderer {
 		}
 	}
 
-}
+}
\ No newline at end of file