--- a/Smalltalk.st	Sun Nov 03 17:05:28 2019 +0100
+++ b/Smalltalk.st	Sun Nov 03 17:06:15 2019 +0100
@@ -7934,7 +7934,7 @@
     ].
 
     "/ first, try a source subdir along the path.
-    SourcePath notNil ifTrue:[
+    SourcePath notEmptyOrNil ifTrue:[
         f := self searchPath:SourcePath for:aFileName in:SourceDirName.
     ].
     f isNil ifTrue:[