diff --git a/core/engine/src/value/operations.rs b/core/engine/src/value/operations.rs
index c26a0b00ba..d243315bea 100644
--- a/core/engine/src/value/operations.rs
+++ b/core/engine/src/value/operations.rs
@@ -477,10 +477,9 @@ impl JsValue {
             ),
             Self::String(ref str) => Self::new(-str.to_number()),
             Self::Rational(num) => Self::new(-num),
-            Self::Integer(0) => Self::new(-f64::from(0)),
+            Self::Integer(0) | Self::Boolean(false) | Self::Null => Self::new(-f64::from(0)),
             Self::Integer(num) => Self::new(-num),
-            Self::Boolean(true) => Self::new(1),
-            Self::Boolean(false) | Self::Null => Self::new(0),
+            Self::Boolean(true) => Self::new(-f64::from(1)),
             Self::BigInt(ref x) => Self::new(JsBigInt::neg(x)),
         })
     }
diff --git a/core/engine/src/value/tests.rs b/core/engine/src/value/tests.rs
index 4d8fffc169..c689a1fc3c 100644
--- a/core/engine/src/value/tests.rs
+++ b/core/engine/src/value/tests.rs
@@ -64,6 +64,9 @@ fn abstract_equality_comparison() {
         TestAction::assert("+0 == 0"),
         TestAction::assert("-0 == 0"),
         TestAction::assert("0 == false"),
+        TestAction::assert("-0 == -false"),
+        TestAction::assert("-0 == -null"),
+        TestAction::assert("-1 == -true"),
         TestAction::assert("'' == false"),
         TestAction::assert("'' == 0"),
         TestAction::assert("'17' == 17"),