diff --git a/lib/atc/Makefile.g++ b/lib/atc/Makefile.g++
index 17ddd9d24d..1282dc2c03 100644
--- a/lib/atc/Makefile.g++
+++ b/lib/atc/Makefile.g++
@@ -98,7 +98,7 @@ OBJ =   $(SRC:.cpp=.o)
 # the same MPI library that LAMMPS is built with
 
 CC =	        g++
-CCFLAGS =       -O -g -I../../src -DMPICH_IGNORE_CXX_SEEK
+CCFLAGS =       -O -g -fPIC -I../../src -DMPICH_IGNORE_CXX_SEEK
 ARCHIVE =	ar
 ARCHFLAG =	-rc
 DEPFLAGS =      -M
diff --git a/lib/atc/Makefile.icc b/lib/atc/Makefile.icc
index 43425acab7..3d7fbeb050 100644
--- a/lib/atc/Makefile.icc
+++ b/lib/atc/Makefile.icc
@@ -98,7 +98,7 @@ OBJ =   $(SRC:.cpp=.o)
 # the same MPI library that LAMMPS is built with
 
 CC =	        icc
-CCFLAGS =       -O -g -I../../src -DMPICH_IGNORE_CXX_SEEK
+CCFLAGS =       -O -g -fPIC -I../../src -DMPICH_IGNORE_CXX_SEEK
 ARCHIVE =	ar
 ARCHFLAG =	-rc
 DEPFLAGS =      -M
diff --git a/lib/atc/Makefile.serial b/lib/atc/Makefile.serial
index 04c10cebb0..9dd1f389c1 100644
--- a/lib/atc/Makefile.serial
+++ b/lib/atc/Makefile.serial
@@ -98,7 +98,7 @@ OBJ =   $(SRC:.cpp=.o)
 # the same MPI library that LAMMPS is built with
 
 CC =	        g++
-CCFLAGS =       -O -g -I../../src -I../../src/STUBS
+CCFLAGS =       -O -g -fPIC -I../../src -I../../src/STUBS
 ARCHIVE =	ar
 ARCHFLAG =	-rc
 DEPFLAGS =      -M