diff --git a/Source/CursesDialog/form/fty_ipv4.c b/Source/CursesDialog/form/fty_ipv4.c
index 4ac8a50ec..c855af655 100644
--- a/Source/CursesDialog/form/fty_ipv4.c
+++ b/Source/CursesDialog/form/fty_ipv4.c
@@ -30,7 +30,7 @@ static bool Check_IPV4_Field(FIELD * field, const void * argp)
 {
   char *bp = field_buffer(field,0);
   int num = 0, len;
-  unsigned int d1, d2, d3, d4;
+  unsigned int d1=256, d2=256, d3=256, d4=256;
 
   argp=0; /* Silence unused parameter warning.  */