3 files changed, 3 insertions, 0 deletions
diff --git a/apl9.h b/apl9.h
index 2cf0069..d8afcb1 100644
--- a/apl9.h
+++ b/apl9.h
@@ -133,6 +133,7 @@ struct Operator
 		int code;
 		Rune *dop;
 	};
+	DfnFrame *scope;
 	Datum *left;
 	Datum *right;
 };
diff --git a/eval.c b/eval.c
index aa74698..58a745b 100644
--- a/eval.c
+++ b/eval.c
@@ -336,6 +336,7 @@ monadop(Datum *left, Datum *right)
 	result->func.operator.left = left;
 	incdatumref(left);
 	result->func.left = nil;
+	result->func.scope = right->operator.scope;
 	return result;
 }
 
diff --git a/lexer.c b/lexer.c
index 93fdb62..974d66e 100644
--- a/lexer.c
+++ b/lexer.c
@@ -124,6 +124,7 @@ lexline(InputStream *input, int toplevel)
 				stmt->toks[stmt->ntoks]->operator.type = OperatortypeDop;
 				stmt->toks[stmt->ntoks]->operator.dyadic = oplevel == 2;
 				stmt->toks[stmt->ntoks]->operator.dop = runestrdup(buf);
+				stmt->toks[stmt->ntoks]->operator.scope = getcurrentdfn();
 			}
 		}else if(peek == '('){
 			int unclosed = 1;