diff --git a/plugins/groovy/src/org/jetbrains/plugins/groovy/lang/psi/ClosureParameterEnhancer.java b/plugins/groovy/src/org/jetbrains/plugins/groovy/lang/psi/ClosureParameterEnhancer.java
index e111f2f34773..9410c7bf77dd 100644
--- a/plugins/groovy/src/org/jetbrains/plugins/groovy/lang/psi/ClosureParameterEnhancer.java
+++ b/plugins/groovy/src/org/jetbrains/plugins/groovy/lang/psi/ClosureParameterEnhancer.java
@@ -13,6 +13,7 @@ import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrExpres
 import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrMethodCall;
 import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrReferenceExpression;
 import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.arithmetic.GrRangeExpression;
+import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.literals.GrStringInjection;
 import org.jetbrains.plugins.groovy.lang.psi.impl.GrRangeType;
 import org.jetbrains.plugins.groovy.lang.psi.impl.GrTupleType;
 import org.jetbrains.plugins.groovy.lang.psi.impl.statements.expressions.TypesUtil;
@@ -85,6 +86,10 @@ public class ClosureParameterEnhancer extends AbstractClosureParameterEnhancer {
   @Nullable
   protected PsiType getClosureParameterType(GrClosableBlock closure, int index) {
     PsiElement parent = closure.getParent();
+    if (parent instanceof GrStringInjection && index == 0) {
+      return TypesUtil.createTypeByFQClassName(CommonClassNames.JAVA_LANG_STRING_BUILDER, closure);
+    }
+    
     if (parent instanceof GrArgumentList) parent = parent.getParent();
     if (!(parent instanceof GrMethodCall)) {
       return null;
diff --git a/plugins/groovy/test/org/jetbrains/plugins/groovy/lang/resolve/TypeInferenceTest.java b/plugins/groovy/test/org/jetbrains/plugins/groovy/lang/resolve/TypeInferenceTest.java
index 37a1d97d5c67..b5efb28857a1 100644
--- a/plugins/groovy/test/org/jetbrains/plugins/groovy/lang/resolve/TypeInferenceTest.java
+++ b/plugins/groovy/test/org/jetbrains/plugins/groovy/lang/resolve/TypeInferenceTest.java
@@ -243,6 +243,6 @@ public class TypeInferenceTest extends GroovyResolveTestCase {
   }
 
   public void testSingleParameterInStringInjection() {
-    assertTypeEquals("java.util.StringBuilder", "a.groovy");
+    assertTypeEquals("java.lang.StringBuilder", "a.groovy");
   }
 }
diff --git a/plugins/groovy/testdata/resolve/inference/singleParameterInStringInjection/a.groovy b/plugins/groovy/testdata/resolve/inference/singleParameterInStringInjection/a.groovy
new file mode 100644
index 000000000000..5be6015b5223
--- /dev/null
+++ b/plugins/groovy/testdata/resolve/inference/singleParameterInStringInjection/a.groovy
@@ -0,0 +1 @@
+[2, 3, 4].collect {"${builder -> bui<ref>lder.append(it)}"}
\ No newline at end of file