1 files changed, 1 insertions, 1 deletions
diff --git a/src/SMAPI/Framework/ContentPack.cs b/src/SMAPI/Framework/ContentPack.cs
index 161fdbe4..a6835dbe 100644
--- a/src/SMAPI/Framework/ContentPack.cs
+++ b/src/SMAPI/Framework/ContentPack.cs
@@ -119,7 +119,7 @@ namespace StardewModdingAPI.Framework
             if (!PathUtilities.IsSafeRelativePath(relativePath))
                 throw new InvalidOperationException($"You must call {nameof(IContentPack)} methods with a relative path.");
 
-            return this.RelativePaths.TryGetValue(relativePath, out string caseInsensitivePath)
+            return !string.IsNullOrWhiteSpace(relativePath) && this.RelativePaths.TryGetValue(relativePath, out string caseInsensitivePath)
                 ? caseInsensitivePath
                 : relativePath;
         }