diff --git a/Makefile.FreeBSD b/Makefile.FreeBSD
index c9a2293..a9494f9 100644
--- a/Makefile.FreeBSD
+++ b/Makefile.FreeBSD
@@ -16,7 +16,7 @@ LDFLAGS += -pthread -fno-strict-aliasing
 DCFLAGS = -fPIC
 DLFLAGS = -shared
 DLSUFFICS = .so
-LIBS =
+LIBS ?=
 LIBSPREFIX = -l
 LIBSSUFFIX = 
 LNOUT = -o 
@@ -29,7 +29,7 @@ AFTERCLEAN = (find . -type f -name "*.o" -delete && find src/ -type f -name "Mak
 TYPECOMMAND = cat
 COMPATLIBS =
 MAKEFILE = Makefile.FreeBSD
-PLUGINS = StringsPlugin TrafficPlugin PCREPlugin PamAuth TransparentPlugin
+PLUGINS ?= StringsPlugin TrafficPlugin PCREPlugin PamAuth TransparentPlugin
 
 include Makefile.inc
 
diff --git a/Makefile.Linux b/Makefile.Linux
index a9f9d4e..913a242 100644
--- a/Makefile.Linux
+++ b/Makefile.Linux
@@ -33,9 +33,9 @@ MAKEFILE = Makefile.Linux
 # PamAuth requires libpam, you may require pam-devel package to be installed
 # SSLPlugin requires  -lcrypto -lssl
 #LIBS = -lcrypto -lssl -ldl 
-LIBS = -ldl 
+LIBS ?= -ldl 
 #PLUGINS = SSLPlugin StringsPlugin TrafficPlugin PCREPlugin TransparentPlugin PamAuth
-PLUGINS = StringsPlugin TrafficPlugin PCREPlugin TransparentPlugin
+PLUGINS ?= StringsPlugin TrafficPlugin PCREPlugin TransparentPlugin
 
 include Makefile.inc