diff --git a/extensions/markdown/src/security.ts b/extensions/markdown/src/security.ts
index 5f0898e49721932031797c9bcec3d9882d670a42..56312a59d5f5927b5d3a1dbfebe6ab0500378036 100644
--- a/extensions/markdown/src/security.ts
+++ b/extensions/markdown/src/security.ts
@@ -127,7 +127,7 @@ export class PreviewSecuritySelector {
 					label: this.cspArbiter.shouldDisableSecurityWarnings()
 						? localize('enableSecurityWarning.title', "Enable preview security warnings in this workspace")
 						: localize('disableSecurityWarning.title', "Disable preview security warning in this workspace"),
-					description: localize('toggleSecurityWarning.description', 'Does not effect the content security level')
+					description: localize('toggleSecurityWarning.description', 'Does not affect the content security level')
 				},
 			], {
 				placeHolder: localize(