diff --git a/compiler/cpp/Makefile.am b/compiler/cpp/Makefile.am
index faaac25..bc0dd7b 100644
--- a/compiler/cpp/Makefile.am
+++ b/compiler/cpp/Makefile.am
@@ -22,6 +22,7 @@
 # details.
 
 AM_YFLAGS = -d
+LIBS =
 BUILT_SOURCES =
 
 bin_PROGRAMS = thrift