diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9a174b4..e634cb3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@
 ### Changed
 
 - Requires PHP `8.5`
+- Exception messages raised in `RegExp` now uses `preg_last_error_msg()` for better debuggability
 
 ### Fixed
 
diff --git a/src/RegExp.php b/src/RegExp.php
index 291f626..5053f5a 100644
--- a/src/RegExp.php
+++ b/src/RegExp.php
@@ -20,7 +20,7 @@ private function __construct(string $pattern)
         /** @psalm-suppress ArgumentTypeCoercion */
         if (@\preg_match($pattern, '') === false) {
             /** @psalm-suppress ImpureFunctionCall */
-            throw new LogicException($pattern, \preg_last_error());
+            throw new LogicException(\preg_last_error_msg(), \preg_last_error());
         }
 
         $this->pattern = $pattern;
@@ -46,7 +46,7 @@ public function matches(Str $string): bool
 
         if ($value === false) {
             /** @psalm-suppress ImpureFunctionCall */
-            throw new InvalidRegex('', \preg_last_error());
+            throw new InvalidRegex(\preg_last_error_msg(), \preg_last_error());
         }
 
         return (bool) $value;
@@ -66,7 +66,7 @@ public function capture(Str $string): Map
 
         if ($value === false) {
             /** @psalm-suppress ImpureFunctionCall */
-            throw new InvalidRegex('', \preg_last_error());
+            throw new InvalidRegex(\preg_last_error_msg(), \preg_last_error());
         }
 
         /** @var Map<int|string, Str> */