diff --git a/winpr/libwinpr/clipboard/clipboard.c b/winpr/libwinpr/clipboard/clipboard.c
index 2e88d75bb..0d236e8da 100644
--- a/winpr/libwinpr/clipboard/clipboard.c
+++ b/winpr/libwinpr/clipboard/clipboard.c
@@ -89,6 +89,9 @@ static wClipboardFormat* ClipboardFindFormat(wClipboard* clipboard, UINT32 forma
 	{
 		for (index = 0; index < clipboard->numFormats; index++)
 		{
+			if (!clipboard->formats[index].formatName)
+				continue;
+
 			if (strcmp(name, clipboard->formats[index].formatName) == 0)
 			{
 				format = &clipboard->formats[index];