diff --git a/src/expr.c b/src/expr.c
index 336acd5..fe54b9e 100644
--- a/src/expr.c
+++ b/src/expr.c
@@ -861,7 +861,7 @@ apfl_expr_eq(struct apfl_expr a, struct apfl_expr b)
         return false;
     }
 
-    if (apfl_position_eq(a.position, b.position)) {
+    if (!apfl_position_eq(a.position, b.position)) {
         return false;
     }