diff --git a/plugins/grazie/src/test/kotlin/com/intellij/grazie/spellchecker/dictionary/ProjectDictionaryTest.java b/plugins/grazie/src/test/kotlin/com/intellij/grazie/spellchecker/dictionary/ProjectDictionaryTest.java
index abaffa607cf6..688753134f4d 100644
--- a/plugins/grazie/src/test/kotlin/com/intellij/grazie/spellchecker/dictionary/ProjectDictionaryTest.java
+++ b/plugins/grazie/src/test/kotlin/com/intellij/grazie/spellchecker/dictionary/ProjectDictionaryTest.java
@@ -69,6 +69,13 @@ public class ProjectDictionaryTest extends SpellcheckerInspectionTestCase {
     assertEquals(Alien, projectDictionary.lookup(eeee));
   }
 
+  public void testNoTyposInUpperCaseWords() {
+    var dictionary = createProjectDictionary(Set.of("pghost"));
+    assertEquals(Present, dictionary.lookup("PGHOST"));
+    assertEquals(Present, dictionary.lookup("Pghost"));
+    assertEquals(Alien, dictionary.lookup("pgHoSt"));
+  }
+
   public void testClear() {
     ProjectDictionary projectDictionary = createProjectDictionary(PROJECT_WORDS);
     projectDictionary.clear();
diff --git a/spellchecker/src/com/intellij/spellchecker/dictionary/UserDictionary.java b/spellchecker/src/com/intellij/spellchecker/dictionary/UserDictionary.java
index 9d9fce59734e..26681b5ab7af 100644
--- a/spellchecker/src/com/intellij/spellchecker/dictionary/UserDictionary.java
+++ b/spellchecker/src/com/intellij/spellchecker/dictionary/UserDictionary.java
@@ -9,6 +9,7 @@ import org.jetbrains.annotations.Nullable;
 import java.util.Collection;
 import java.util.Set;
 
+import static com.intellij.openapi.util.text.StringUtil.*;
 import static com.intellij.util.containers.CollectionFactory.createSmallMemoryFootprintSet;
 
 public final class UserDictionary implements EditableDictionary {
@@ -37,7 +38,9 @@ public final class UserDictionary implements EditableDictionary {
 
   @Override
   public @Nullable Boolean contains(@NotNull String word) {
-    return words.contains(word) ? true : null;
+    if (words.contains(word)) return true;
+    if (isUpperCase(word) || isCapitalized(word)) return words.contains(toLowerCase(word)) ? true : null;
+    return null;
   }
 
   @Override