diff --git a/layout/generic/nsLineBox.cpp b/layout/generic/nsLineBox.cpp
index 25f3187b7155..8dc62df029f4 100644
--- a/layout/generic/nsLineBox.cpp
+++ b/layout/generic/nsLineBox.cpp
@@ -225,7 +225,7 @@ nsLineIterator::~nsLineIterator()
   }
 }
 
-NS_IMPL_QUERY_INTERFACE(nsLineIterator, kILineIteratorIID)
+NS_IMPL_ISUPPORTS(nsLineIterator, kILineIteratorIID)
 
 nsresult
 nsLineIterator::Init(nsLineBox* aLines, PRBool aRightToLeft)
diff --git a/layout/html/base/src/nsLineBox.cpp b/layout/html/base/src/nsLineBox.cpp
index 25f3187b7155..8dc62df029f4 100644
--- a/layout/html/base/src/nsLineBox.cpp
+++ b/layout/html/base/src/nsLineBox.cpp
@@ -225,7 +225,7 @@ nsLineIterator::~nsLineIterator()
   }
 }
 
-NS_IMPL_QUERY_INTERFACE(nsLineIterator, kILineIteratorIID)
+NS_IMPL_ISUPPORTS(nsLineIterator, kILineIteratorIID)
 
 nsresult
 nsLineIterator::Init(nsLineBox* aLines, PRBool aRightToLeft)