diff --git a/include/dsd.h b/include/dsd.h
index 22ef3e9..353b8de 100644
--- a/include/dsd.h
+++ b/include/dsd.h
@@ -61,7 +61,7 @@
 /*
  * global variables
  */
-int exitflag;
+extern int exitflag;
 
 
 typedef struct
diff --git a/src/dsd_main.c b/src/dsd_main.c
index 4069ce0..02decec 100644
--- a/src/dsd_main.c
+++ b/src/dsd_main.c
@@ -28,6 +28,7 @@
 #include "p25p1_heuristics.h"
 #include "pa_devs.h"
 
+int exitflag = 0;
 
 int
 comp (const void *a, const void *b)