diff --git a/src/MAKE/Makefile.serial b/src/MAKE/Makefile.serial
index 2d9d9227a6..cf39d32444 100755
--- a/src/MAKE/Makefile.serial
+++ b/src/MAKE/Makefile.serial
@@ -24,7 +24,7 @@ SIZE =		size
 # LAMMPS ifdef settings, OPTIONAL
 # see possible settings in doc/Section_start.html#2_2 (step 4)
 
-LMP_INC =	-DLAMMPS_GZIP -DLAMMPS_BIGBIG
+LMP_INC =	-DLAMMPS_GZIP
 
 # MPI library, REQUIRED
 # see discussion in doc/Section_start.html#2_2 (step 5)