diff --git a/debian/rules b/debian/rules
index f033fbd..5f1f3d6 100755
--- a/debian/rules
+++ b/debian/rules
@@ -11,14 +11,14 @@ CFLAGS="$CFLAGS -Wno-implicit-function-declaration"
 	dh $@ --without python-support
 
 override_dh_auto_build:
-	DESTDIR=$(CURDIR)/debian/$(DEBNAME) CFLAGS="$CFLAGS -Wno-implicit-function-declaration" prxs -c $(MODULE_NAME).c
+	DESTDIR=$(CURDIR)/debian/$(DEBNAME) CFLAGS=$(CFLAGS) prxs -c $(MODULE_NAME).c
 	
 override_dh_auto_install:
-	DESTDIR=$(CURDIR)/debian/$(DEBNAME) CFLAGS="$CFLAGS -Wno-implicit-function-declaration" prxs -i -c $(MODULE_NAME).c
+	DESTDIR=$(CURDIR)/debian/$(DEBNAME) CFLAGS=$(CFLAGS) prxs -i -c $(MODULE_NAME).c
 
 override_dh_gencontrol:
 	cat /usr/share/proftpd/proftpd-substvars >>$(CURDIR)/debian/$(DEBNAME).substvars
 	dh_gencontrol
 
 override_dh_auto_clean:
-	DESTDIR=$(CURDIR)/debian/$(DEBNAME) CFLAGS="$CFLAGS -Wno-implicit-function-declaration" prxs -d $(MODULE_NAME).c
+	DESTDIR=$(CURDIR)/debian/$(DEBNAME) CFLAGS=$(CFLAGS) prxs -d $(MODULE_NAME).c