diff --git a/idea/src/org/jetbrains/jet/plugin/completion/JetKeywordCompletionContributor.java b/idea/src/org/jetbrains/jet/plugin/completion/JetKeywordCompletionContributor.java
index 0f2a87b1075..e8332db914b 100644
--- a/idea/src/org/jetbrains/jet/plugin/completion/JetKeywordCompletionContributor.java
+++ b/idea/src/org/jetbrains/jet/plugin/completion/JetKeywordCompletionContributor.java
@@ -221,7 +221,7 @@ public class JetKeywordCompletionContributor extends CompletionContributor {
 
         @Override
         public boolean prefixMatches(@NotNull String name) {
-            return StringUtil.startsWithIgnoreCase(name, getPrefix());
+            return StringUtil.startsWith(name, getPrefix());
         }
 
         @NotNull
diff --git a/idea/testData/completion/keywords/NoCompletionForCapitalPrefix.kt b/idea/testData/completion/keywords/NoCompletionForCapitalPrefix.kt
new file mode 100644
index 00000000000..ca982f7b7c1
--- /dev/null
+++ b/idea/testData/completion/keywords/NoCompletionForCapitalPrefix.kt
@@ -0,0 +1,3 @@
+P<caret>
+
+// ABSENT: public, private, protected
\ No newline at end of file
diff --git a/idea/tests/org/jetbrains/jet/completion/KeywordsCompletionTest.java b/idea/tests/org/jetbrains/jet/completion/KeywordsCompletionTest.java
index e90a03da3f0..a40079f9530 100644
--- a/idea/tests/org/jetbrains/jet/completion/KeywordsCompletionTest.java
+++ b/idea/tests/org/jetbrains/jet/completion/KeywordsCompletionTest.java
@@ -119,6 +119,10 @@ public class KeywordsCompletionTest extends JetCompletionTestBase {
         doTest();
     }
 
+    public void testNoCompletionForCapitalPrefix() {
+        doTest();
+    }
+
     public void testPropertySetterGetter() {
         doTest();
     }