diff --git a/liberty/LibertyReader.cc b/liberty/LibertyReader.cc
index f26d7076..5d394ea4 100644
--- a/liberty/LibertyReader.cc
+++ b/liberty/LibertyReader.cc
@@ -295,7 +295,7 @@ LibertyReader::defineVisitors()
 		    &LibertyReader::visitClockGatingIntegratedCell);
   defineAttrVisitor("area", &LibertyReader::visitArea);
   defineAttrVisitor("dont_use", &LibertyReader::visitDontUse);
-  defineAttrVisitor("is_macro", &LibertyReader::visitIsMacro);
+  defineAttrVisitor("is_macro_cell", &LibertyReader::visitIsMacro);
   defineAttrVisitor("is_memory", &LibertyReader::visitIsMemory);
   defineAttrVisitor("is_pad", &LibertyReader::visitIsPad);
   defineAttrVisitor("is_clock_cell", &LibertyReader::visitIsClockCell);
diff --git a/liberty/LibertyWriter.cc b/liberty/LibertyWriter.cc
index 5a94f482..2a53babf 100644
--- a/liberty/LibertyWriter.cc
+++ b/liberty/LibertyWriter.cc
@@ -272,7 +272,7 @@ LibertyWriter::writeCell(const LibertyCell *cell)
   if (area > 0.0)
     fprintf(stream_, "    area : %.3f \n", area);
   if (cell->isMacro())
-    fprintf(stream_, "    is_macro : true;\n");
+    fprintf(stream_, "    is_macro_cell : true;\n");
   if (cell->interfaceTiming())
     fprintf(stream_, "    interface_timing : true;\n");
 
diff --git a/search/MakeTimingModel.cc b/search/MakeTimingModel.cc
index 24e8c6e3..9d82c8fb 100644
--- a/search/MakeTimingModel.cc
+++ b/search/MakeTimingModel.cc
@@ -156,7 +156,7 @@ void
 MakeTimingModel::makeCell()
 {
   cell_ = lib_builder_->makeCell(library_, cell_name_, filename_);
-  cell_->setInterfaceTiming(true);
+  cell_->setIsMacro(true);
 }
 
 void