diff --git a/src/MAKE/OPTIONS/Makefile.icc_mpich b/src/MAKE/OPTIONS/Makefile.icc_mpich
index 87fe1417e05d5a78009fb1ddc76001ef79ebf5f0..e59066562a58eb1bb7103105b68fef664b06817b 100644
--- a/src/MAKE/OPTIONS/Makefile.icc_mpich
+++ b/src/MAKE/OPTIONS/Makefile.icc_mpich
@@ -7,7 +7,7 @@ SHELL = /bin/sh
 # specify flags and libraries needed for your compiler
 
 CC =		mpicxx -cxx=icc
-CCFLAGS =	-g -O3
+CCFLAGS =	-g -O3 -restrict
 SHFLAGS =	-fPIC
 DEPFLAGS =	-M
 
diff --git a/src/MAKE/OPTIONS/Makefile.icc_mpich_link b/src/MAKE/OPTIONS/Makefile.icc_mpich_link
index 1e45692eb656d1456a76784c20f046f1d26b0eaa..0e9e530f88f1189aed44723134e09319c1a40190 100644
--- a/src/MAKE/OPTIONS/Makefile.icc_mpich_link
+++ b/src/MAKE/OPTIONS/Makefile.icc_mpich_link
@@ -7,7 +7,7 @@ SHELL = /bin/sh
 # specify flags and libraries needed for your compiler
 
 CC =		icc
-CCFLAGS =	-g -O3
+CCFLAGS =	-g -O3 -restrict
 SHFLAGS =	-fPIC
 DEPFLAGS =	-M
 
diff --git a/src/MAKE/OPTIONS/Makefile.icc_openmpi b/src/MAKE/OPTIONS/Makefile.icc_openmpi
index e1ccbc4c368ad90dc673da2c7fcfceee15e42366..19a917e9287f11e88ef28d05e8e6357ea9994082 100644
--- a/src/MAKE/OPTIONS/Makefile.icc_openmpi
+++ b/src/MAKE/OPTIONS/Makefile.icc_openmpi
@@ -8,7 +8,7 @@ SHELL = /bin/sh
 
 export OMPI_CXX = icc
 CC =		mpicxx
-CCFLAGS =	-g -O3
+CCFLAGS =	-g -O3 -restrict
 SHFLAGS =	-fPIC
 DEPFLAGS =	-M
 
diff --git a/src/MAKE/OPTIONS/Makefile.icc_openmpi_link b/src/MAKE/OPTIONS/Makefile.icc_openmpi_link
index bd6d40f0539f9b0717c95fe54738ab66167af252..5e991c6b90da2810c899d74682d126ac78a86cd8 100644
--- a/src/MAKE/OPTIONS/Makefile.icc_openmpi_link
+++ b/src/MAKE/OPTIONS/Makefile.icc_openmpi_link
@@ -7,7 +7,7 @@ SHELL = /bin/sh
 # specify flags and libraries needed for your compiler
 
 CC =		icc
-CCFLAGS =	-g -O3
+CCFLAGS =	-g -O3 -restrict
 SHFLAGS =	-fPIC
 DEPFLAGS =	-M
 
diff --git a/src/MAKE/OPTIONS/Makefile.icc_serial b/src/MAKE/OPTIONS/Makefile.icc_serial
index 0a4698eba8165725c3de9e5a5060768cf9636d0c..34bf091932d36fd35defa6535b568bfe1c3841f7 100644
--- a/src/MAKE/OPTIONS/Makefile.icc_serial
+++ b/src/MAKE/OPTIONS/Makefile.icc_serial
@@ -7,7 +7,7 @@ SHELL = /bin/sh
 # specify flags and libraries needed for your compiler
 
 CC =		icc
-CCFLAGS =	-g -O3
+CCFLAGS =	-g -O3 -restrict
 SHFLAGS =	-fPIC
 DEPFLAGS =	-M