diff --git a/src/vs/workbench/contrib/chat/common/promptSyntax/languageProviders/promptValidator.ts b/src/vs/workbench/contrib/chat/common/promptSyntax/languageProviders/promptValidator.ts
index f44449e2ddc66..e803859df9d5d 100644
--- a/src/vs/workbench/contrib/chat/common/promptSyntax/languageProviders/promptValidator.ts
+++ b/src/vs/workbench/contrib/chat/common/promptSyntax/languageProviders/promptValidator.ts
@@ -172,8 +172,8 @@ export class PromptValidator {
 							const loc = this.labelService.getUriLabel(resolved);
 							report(toMarker(localize('promptValidator.fileNotFound', "File '{0}' not found at '{1}'.", ref.content, loc), ref.range, MarkerSeverity.Warning));
 						}
-					} catch {
-						this.logger.warn(`Error checking existence of file reference '${ref.content}' resolved to '${resolved.toString()}' in prompt file '${promptAST.uri.toString()}'`);
+					} catch (e) {
+						this.logger.warn(`Error checking existence of file reference '${ref.content}' resolved to '${resolved.toString()}' in prompt file '${promptAST.uri.toString()}': ${e.message}`);
 					}
 				})());
 			}