diff --git a/src/IntType.php b/src/IntType.php
index 05f08df..404ef47 100644
--- a/src/IntType.php
+++ b/src/IntType.php
@@ -17,7 +17,7 @@ final public static function from(
 			return (int) $value;
 		}
 
-		if (Validators::isNumeric($value) && (int) $value === (int) \ceil(\abs((float) $value))) {
+		if (Validators::isNumeric($value) && \abs((int) $value) === (int) \ceil(\abs((float) $value))) {
 			return (int) $value;
 		}
 
diff --git a/tests/IntTypeTest.phpt b/tests/IntTypeTest.phpt
index fc2e376..df218ff 100644
--- a/tests/IntTypeTest.phpt
+++ b/tests/IntTypeTest.phpt
@@ -45,6 +45,9 @@ final class IntTypeTest extends TestCase
 			'1',
 			1.000_00,
 			'1.00000',
+			-1,
+			-1.0,
+			'-1.0',
 		];
 
 		foreach ($invalid as $value) {