From 4ffd458b54d3037f86f0ea2200b37185108b53d6 Mon Sep 17 00:00:00 2001
From: Robbie Ostrow <ostrowr@gmail.com>
Date: Sun, 5 Apr 2026 16:14:52 -0700
Subject: [PATCH] support negative multiples

---
 crates/jsonschema/src/ext/numeric.rs          | 2 +-
 crates/jsonschema/src/keywords/multiple_of.rs | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/crates/jsonschema/src/ext/numeric.rs b/crates/jsonschema/src/ext/numeric.rs
index 42522694..b14261f8 100644
--- a/crates/jsonschema/src/ext/numeric.rs
+++ b/crates/jsonschema/src/ext/numeric.rs
@@ -66,7 +66,7 @@ pub(crate) fn is_multiple_of_float(value: &Number, multiple: f64) -> bool {
         if value_f64.is_zero() {
             return true;
         }
-        if value_f64 < multiple {
+        if value_f64.abs() < multiple {
             return false;
         }
         // From the JSON Schema spec
diff --git a/crates/jsonschema/src/keywords/multiple_of.rs b/crates/jsonschema/src/keywords/multiple_of.rs
index baa07974..a7162338 100644
--- a/crates/jsonschema/src/keywords/multiple_of.rs
+++ b/crates/jsonschema/src/keywords/multiple_of.rs
@@ -399,6 +399,7 @@ mod tests {
     #[test_case(&json!({"multipleOf": 0.1}), &json!(1.3))]
     #[test_case(&json!({"multipleOf": 0.02}), &json!(1.02))]
     #[test_case(&json!({"multipleOf": 1e-16}), &json!(1e-15))]
+    #[test_case(&json!({"multipleOf": 0.5}), &json!(-6))]
     fn multiple_of_is_valid(schema: &Value, instance: &Value) {
         tests_util::is_valid(schema, instance);
     }