diff --git a/install_easy.sh b/install_easy.sh
index ff35e3e..e9780d7 100755
--- a/install_easy.sh
+++ b/install_easy.sh
@@ -102,7 +102,7 @@ check_bins()
 				make_target=systemd
 				;;
 		esac
-		CFLAGS="${cf:+$cf }${CFLAGS}" make -C "$EXEDIR" $make_target || {
+		CFLAGS="${cf:+$cf }${CFLAGS}" OPTIMIZE=-O2 make -C "$EXEDIR" $make_target || {
 			echo could not compile
 			make -C "$EXEDIR" clean
 			exitp 8
diff --git a/ip2net/Makefile b/ip2net/Makefile
index 484f3d7..51a7708 100644
--- a/ip2net/Makefile
+++ b/ip2net/Makefile
@@ -1,5 +1,6 @@
 CC ?= gcc
-CFLAGS += -std=gnu99 -Os -flto=auto
+OPTIMIZE ?= -Os
+CFLAGS += -std=gnu99 $(OPTIMIZE) -flto=auto
 CFLAGS_BSD = -Wno-address-of-packed-member
 CFLAGS_WIN = -static
 LIBS = 
diff --git a/mdig/Makefile b/mdig/Makefile
index 21b6c84..092d0b5 100644
--- a/mdig/Makefile
+++ b/mdig/Makefile
@@ -1,5 +1,6 @@
 CC ?= gcc
-CFLAGS += -std=gnu99 -Os
+OPTIMIZE ?= -Os
+CFLAGS += -std=gnu99 $(OPTIMIZE)
 CFLAGS_BSD = -Wno-address-of-packed-member
 CFLAGS_WIN = -static
 LIBS = -lpthread
diff --git a/nfq/BSDmakefile b/nfq/BSDmakefile
index 156311e..f21d118 100644
--- a/nfq/BSDmakefile
+++ b/nfq/BSDmakefile
@@ -1,5 +1,6 @@
 CC ?= cc
-CFLAGS += -std=gnu99 -s -Os -Wno-address-of-packed-member -flto=auto
+OPTIMIZE ?= -Os
+CFLAGS += -std=gnu99 -s $(OPTIMIZE) -flto=auto -Wno-address-of-packed-member
 LIBS = -lz
 SRC_FILES = *.c crypto/*.c
 
diff --git a/nfq/Makefile b/nfq/Makefile
index f368101..05549e0 100644
--- a/nfq/Makefile
+++ b/nfq/Makefile
@@ -1,5 +1,6 @@
 CC ?= gcc
-CFLAGS += -std=gnu99 -Os -flto=auto
+OPTIMIZE ?= -Os
+CFLAGS += -std=gnu99 $(OPTIMIZE) -flto=auto
 CFLAGS_SYSTEMD = -DUSE_SYSTEMD
 CFLAGS_BSD = -Wno-address-of-packed-member
 CFLAGS_CYGWIN = -Wno-address-of-packed-member -static
diff --git a/tpws/BSDmakefile b/tpws/BSDmakefile
index 3f6b2cf..f226419 100644
--- a/tpws/BSDmakefile
+++ b/tpws/BSDmakefile
@@ -1,5 +1,6 @@
 CC ?= cc
-CFLAGS += -std=gnu99 -s -Os -flto=auto
+OPTIMIZE ?= -Os
+CFLAGS += -std=gnu99 -s $(OPTIMIZE) -flto=auto
 LIBS = -lz -lpthread
 SRC_FILES = *.c
 
diff --git a/tpws/Makefile b/tpws/Makefile
index e1270f8..4b1ad81 100644
--- a/tpws/Makefile
+++ b/tpws/Makefile
@@ -1,5 +1,6 @@
 CC ?= gcc
-CFLAGS += -std=gnu99 -Os -flto=auto
+OPTIMIZE ?= -Os
+CFLAGS += -std=gnu99 $(OPTIMIZE) -flto=auto
 CFLAGS_SYSTEMD = -DUSE_SYSTEMD
 CFLAGS_BSD = -Wno-address-of-packed-member
 LDFLAGS_ANDROID = -llog