diff --git a/src/expr.c b/src/expr.c
index fe54b9e..dc18a3e 100644
--- a/src/expr.c
+++ b/src/expr.c
@@ -552,6 +552,25 @@ print_body(struct apfl_expr_body *body, unsigned indent, FILE *f)
     }
 }
 
+static void
+print_constant_with_pos(struct apfl_expr_const constant, struct apfl_position pos, unsigned indent, FILE *f)
+{
+    switch (constant.type) {
+    case APFL_EXPR_CONST_NIL:
+        print_indented(indent, f, "Const (nil) @ " POSFMT "\n", POSARGS(pos));
+        break;
+    case APFL_EXPR_CONST_BOOLEAN:
+        print_indented(indent, f, "Const (%s) @ " POSFMT "\n", constant.boolean ? "true" : "false", POSARGS(pos));
+        break;
+    case APFL_EXPR_CONST_STRING:
+        print_indented(indent, f, "Const (" APFL_STR_FMT ") @ " POSFMT "\n", APFL_STR_FMT_ARGS(constant.string), POSARGS(pos));
+        break;
+    case APFL_EXPR_CONST_NUMBER:
+        print_indented(indent, f, "Const (%f) @ " POSFMT "\n", constant.number, POSARGS(pos));
+        break;
+    }
+}
+
 static void
 print_constant(struct apfl_expr_const constant, unsigned indent, FILE *f)
 {
@@ -703,10 +722,10 @@ print_expr(struct apfl_expr *expr, unsigned indent, FILE *f)
         print_expr(expr->at.rhs, indent+2, f);
         break;
     case APFL_EXPR_CONSTANT:
-        print_constant(expr->constant, indent, f);
+        print_constant_with_pos(expr->constant, expr->position, indent, f);
         break;
     case APFL_EXPR_VAR:
-        print_indented(indent, f, "Var (" APFL_STR_FMT ")\n", APFL_STR_FMT_ARGS(expr->var));
+        print_indented(indent, f, "Var (" APFL_STR_FMT ") @ " POSFMT "\n", APFL_STR_FMT_ARGS(expr->var), POSARGS(expr->position));
         break;
     }
 }