diff --git a/languagetool-language-modules/de/src/main/java/org/languagetool/rules/de/GermanSpellerRule.java b/languagetool-language-modules/de/src/main/java/org/languagetool/rules/de/GermanSpellerRule.java
index c8dfb2ae6cf8..316e271d8ef9 100644
--- a/languagetool-language-modules/de/src/main/java/org/languagetool/rules/de/GermanSpellerRule.java
+++ b/languagetool-language-modules/de/src/main/java/org/languagetool/rules/de/GermanSpellerRule.java
@@ -2393,7 +2393,7 @@ private boolean isValidPartLength(List<String> parts) {
       return parts.get(0).length() >= 3 && parts.get(1).length() >= 4;
     }
     if (parts.size() == 3) {
-      return parts.get(0).length() >= 3 && parts.get(1).length() >= 4 && parts.get(2).length() >= 4;
+      return parts.get(0).length() >= 3 && parts.get(1).length() >= 3 && parts.get(2).length() >= 4;
     }
     return false;
   }
diff --git a/languagetool-language-modules/de/src/test/java/org/languagetool/rules/de/GermanSpellerRuleTest.java b/languagetool-language-modules/de/src/test/java/org/languagetool/rules/de/GermanSpellerRuleTest.java
index 94e8a682ae86..e5f07d2c7a82 100644
--- a/languagetool-language-modules/de/src/test/java/org/languagetool/rules/de/GermanSpellerRuleTest.java
+++ b/languagetool-language-modules/de/src/test/java/org/languagetool/rules/de/GermanSpellerRuleTest.java
@@ -77,6 +77,7 @@ public void testGetMessage() {
   @Test
   public void testIgnoreMisspelledWord() throws IOException {
     GermanSpellerRule rule = new GermanSpellerRule(TestTools.getMessages("de"), GERMAN_DE);
+    assertTrue(rule.ignorePotentiallyMisspelledWord("Chlorgaswolke"));
     assertFalse(rule.ignorePotentiallyMisspelledWord("Bogenschiessen"));
     assertFalse(rule.ignorePotentiallyMisspelledWord("Badefenster"));
     assertFalse(rule.ignorePotentiallyMisspelledWord("Badspaß"));