diff --git a/lib/core/facets/kernel/__dir__.rb b/lib/core/facets/kernel/__dir__.rb
index 937e9e81..bc1e0a75 100644
--- a/lib/core/facets/kernel/__dir__.rb
+++ b/lib/core/facets/kernel/__dir__.rb
@@ -9,7 +9,7 @@ module Kernel
 
   def __DIR__(*paths)
     c = caller.first
-    return nil unless c.rindex(/:\d+(:in `.*')?$/)
+    return nil unless c.rindex(/:\d+(:in [`'].*')?$/)
     file = $` # File.dirname(c)
     return nil if /\A\((.*)\)/ =~ file # eval, etc.
     #File.expand_path(File.join(File.dirname(file), paths))
diff --git a/lib/core/facets/kernel/callstack.rb b/lib/core/facets/kernel/callstack.rb
index 8069ccf0..342c20be 100644
--- a/lib/core/facets/kernel/callstack.rb
+++ b/lib/core/facets/kernel/callstack.rb
@@ -31,7 +31,7 @@ def callstack(level = 1)
     stack = []
     call_str_array.each{ |call_str|
       file, lineno, method = call_str.split(':')
-      if method =~ /in `(.*)'/ then
+      if method =~ /in [`'](.*)'/ then
         method = $1.intern()
       end
       stack << [file, lineno.to_i, method]
diff --git a/lib/core/facets/kernel/require_all.rb b/lib/core/facets/kernel/require_all.rb
index 62f962ea..d4f4df8e 100644
--- a/lib/core/facets/kernel/require_all.rb
+++ b/lib/core/facets/kernel/require_all.rb
@@ -13,7 +13,7 @@ module Kernel
 
   def require_all(pattern)
     c = caller.first
-    fail "Can't parse #{c}" unless c.rindex(/:\d+(:in `.*')?$/)
+    fail "Can't parse #{c}" unless c.rindex(/:\d+(:in [`'].*')?$/)
     file = $` # File.dirname(c)
     if /\A\((.*)\)/ =~ file # eval, etc.
       raise LoadError, "require_relative is called in #{$1}"
@@ -27,7 +27,7 @@ def require_all(pattern)
   # Same as #require_all, but for #load.
   def load_all(pattern, safe=nil)
     c = caller.first
-    fail "Can't parse #{c}" unless c.rindex(/:\d+(:in `.*')?$/)
+    fail "Can't parse #{c}" unless c.rindex(/:\d+(:in [`'].*')?$/)
     file = $` # File.dirname(c)
     if /\A\((.*)\)/ =~ file # eval, etc.
       raise LoadError, "require_relative is called in #{$1}"