--- IOC-0.29.orig/lib/IOC/Service/ConstructorInjection.pm	2007-04-23 01:51:12.000000000 +0200
+++ IOC-0.29/lib/IOC/Service/ConstructorInjection.pm	2020-02-21 18:44:10.935524139 +0100
@@ -46,7 +46,7 @@
                     # and then to be sure, lets look for  
                     # either the VERSION or the ISA variables
                     (defined ${"${component_class}::VERSION"} 
-                        || defined @{"${component_class}::ISA"})) ? 1 : 0;
+                        || @{"${component_class}::ISA"})) ? 1 : 0;
             } || eval "use $component_class";
             # throw our exception if the class fails to load
             throw IOC::ClassLoadingError "The class '$component_class' could not be loaded" => $@ if $@;