diff --git a/Makefile b/Makefile
index f1e9937..41f24e8 100644
--- a/Makefile
+++ b/Makefile
@@ -44,7 +44,6 @@ FLAGS := -Wall -Wextra -Wno-format-zero-length
 FLAGS += -pedantic -std=c11 -D_XOPEN_SOURCE=700 -D_GNU_SOURCE
 FLAGS +=  $(FORTIFY_FLAG) -O2 -pie -fPIE
 FLAGS += -DPAGE_SIZE=$(shell getconf PAGE_SIZE)
-FLAGS += -DNETNS_RUN_DIR=\"/run/netns\"
 FLAGS += -DPASST_AUDIT_ARCH=AUDIT_ARCH_$(AUDIT_ARCH)
 FLAGS += -DRLIMIT_STACK_VAL=$(RLIMIT_STACK_VAL)
 FLAGS += -DARCH=\"$(TARGET_ARCH)\"
diff --git a/conf.c b/conf.c
index 14411b4..86566db 100644
--- a/conf.c
+++ b/conf.c
@@ -46,6 +46,8 @@
 #include "isolation.h"
 #include "log.h"
 
+#define NETNS_RUN_DIR	"/run/netns"
+
 /**
  * next_chunk - Return the next piece of a string delimited by a character
  * @s:		String to search