diff --git a/platform/docker/tts-gateway/test_tts_gateway.py b/platform/docker/tts-gateway/test_tts_gateway.py
index acce0c9..98f96e0 100644
--- a/platform/docker/tts-gateway/test_tts_gateway.py
+++ b/platform/docker/tts-gateway/test_tts_gateway.py
@@ -99,6 +99,17 @@ class LanguageSegmentationTests(unittest.TestCase):
         self.assertIn("example Punkt O R G", spoken)
         self.assertNotIn("https", spoken)
 
+    def test_wind_speed_is_spoken_as_a_unit(self):
+        for text in (
+            "Böen bis etwa 29 km/h.",
+            "Böen bis etwa 29 KM / H.",
+            "Wind mit 29 kmh.",
+        ):
+            with self.subTest(text=text):
+                spoken = gateway.clean_for_speech(text)
+                self.assertIn("29 Kilometer pro Stunde", spoken)
+                self.assertNotIn("km", spoken.lower())
+
 
 class FallbackTests(unittest.TestCase):
     def setUp(self):
diff --git a/platform/docker/tts-gateway/tts_gateway.py b/platform/docker/tts-gateway/tts_gateway.py
index 1e1f92a..90a01d8 100644
--- a/platform/docker/tts-gateway/tts_gateway.py
+++ b/platform/docker/tts-gateway/tts_gateway.py
@@ -268,6 +268,12 @@ def normalize_for_german_speech(text: str) -> str:
         text,
         flags=re.IGNORECASE,
     )
+    text = re.sub(
+        r"(-?\d+(?:[,.]\d+)?)\s*km\s*(?:/\s*)?h\b",
+        r"\1 Kilometer pro Stunde",
+        text,
+        flags=re.IGNORECASE,
+    )
     text = re.sub(r"(\d)\s*%", r"\1 Prozent", text)
     return text