diff --git a/src/MAKE/Makefile.g++ b/src/MAKE/Makefile.g++
index 4312840d5d..a884c91fd7 100755
--- a/src/MAKE/Makefile.g++
+++ b/src/MAKE/Makefile.g++
@@ -28,7 +28,7 @@ SHLIBFLAGS =	-shared
 # LAMMPS ifdef settings, OPTIONAL
 # see possible settings in doc/Section_start.html#2_2 (step 4)
 
-LMP_INC =	-DLAMMPS_GZIP #-DLAMMPS_JPEG
+LMP_INC =	-DLAMMPS_GZIP -DLAMMPS_JPEG
 
 # MPI library, REQUIRED
 # see discussion in doc/Section_start.html#2_2 (step 5)