Index: src/OFStdIOStream.m
==================================================================
--- src/OFStdIOStream.m
+++ src/OFStdIOStream.m
@@ -102,10 +102,13 @@
 #ifdef OF_HAVE_FILES
 	me = [OFApplication programName].lastPathComponent;
 #else
 	me = [OFApplication programName];
 #endif
+
+	if (me == nil)
+		me = @"?";
 
 	msg = [[[OFString alloc] initWithFormat: format
 				      arguments: arguments] autorelease];
 
 	[OFStdErr writeFormat: @"[%@.%03d %@(%d)] %@\n", dateString,