diff --git a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2TemplateTests.java b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2TemplateTests.java
index ef03eefa2bc..c26b40da2c0 100644
--- a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2TemplateTests.java
+++ b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2TemplateTests.java
@@ -9017,6 +9017,24 @@ public class AST2TemplateTests extends AST2CPPTestBase {
 	public void testDecltypeInPackExpansion_486425b() throws Exception {
 		parseAndCheckBindings();
 	}
+	
+	//	template <typename T> 
+	//	class meta {
+	//	    typedef T type;
+	//	};
+	//
+	//	template <typename... Ts>
+	//	using Alias = void(typename meta<Ts>::type...);
+	//
+	//	template <typename... Ts>
+	//	Alias<Ts...>* async(Ts...);
+	//
+	//	int main() {
+	//	    async();  // ERROR: Invalid arguments
+	//	}
+	public void testDependentPackExpansionInFunctionType_526684() throws Exception {
+		parseAndCheckBindings();
+	}
 
 	//	template <typename T>
 	//	struct A {};
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/CPPTemplates.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/CPPTemplates.java
index afb93a6fa51..5ae163e256a 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/CPPTemplates.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/CPPTemplates.java
@@ -1304,12 +1304,21 @@ public class CPPTemplates {
 					IType[] newResult= new IType[result.length + packSize - 1];
 					System.arraycopy(result, 0, newResult, 0, j);
 					result= newResult;
+					context.setExpandPack(true);
 					int oldPackOffset = context.getPackOffset();
 					for (int k= 0; k < packSize; k++) {
 						context.setPackOffset(k);
-						result[j++]= instantiateType(innerType, context);
+						IType instantiated = instantiateType(innerType, context);
+						if (context.isPackExpanded()) {
+							if (instantiated != null) {
+								instantiated = new CPPParameterPackType(instantiated);
+							}
+						}
+						result[j++]= instantiated; 
+						
 					}
 					context.setPackOffset(oldPackOffset);
+					context.setExpandPack(false);
 					continue;
 				}
 			} else {