diff -bu Params-Classify-0.013-i4hqel/lib/Params/Classify.xs~ Params-Classify-0.013-i4hqel/lib/Params/Classify.xs
--- Params-Classify-0.013-i4hqel/lib/Params/Classify.xs~	2010-11-16 21:35:47.000000000 +0100
+++ Params-Classify-0.013-i4hqel/lib/Params/Classify.xs	2016-09-27 23:19:29.000000000 +0200
@@ -610,7 +610,13 @@
 			SV *rv = cSVOPx_sv(rvop);
 			return SvROK(rv) ? (CV*)SvRV(rv) : NULL;
 		} break;
-		case OP_GV: return GvCV(cGVOPx_gv(rvop));
+        case OP_GV: {
+          SV *cv = cSVOPx_sv(rvop);
+          return (SvTYPE(cv) == SVt_PVCV)
+            ? (CV*)cv
+            : (SvROK(cv)
+               ? (CV*)SvRV(cv) : GvCV((GV*)cv));
+        }
 		default: return NULL;
 	}
 }