diff --git a/src/Services/InfoProviderSystem/DTOs/ParameterDTO.php b/src/Services/InfoProviderSystem/DTOs/ParameterDTO.php
index b5597eaf..2332e8c8 100644
--- a/src/Services/InfoProviderSystem/DTOs/ParameterDTO.php
+++ b/src/Services/InfoProviderSystem/DTOs/ParameterDTO.php
@@ -106,7 +106,7 @@ class ParameterDTO
      */
     public static function splitIntoValueAndUnit(string $value): ?array
     {
-       if (preg_match('/^(?<value>[0-9.]+)\s*(?<unit>[°℃a-zA-Z_]+\s?\w{0,4})$/u', $value, $matches)) {
+       if (preg_match('/^(?<value>-?[0-9.]+)\s*(?<unit>[°℃a-zA-Z_]+\s?\w{0,4})$/u', $value, $matches)) {
            $value = $matches['value'];
            $unit = $matches['unit'];
 
@@ -115,4 +115,4 @@ class ParameterDTO
 
          return null;
     }
-}
\ No newline at end of file
+}