diff --git a/datafile.c b/datafile.c
index b6274c0..af42948 100644
--- a/datafile.c
+++ b/datafile.c
@@ -21,7 +21,7 @@
 #include <unistd.h>
 #include <sys/stat.h>
 
-#define ISC_BUFFER_USEINLINE
+#define ISC_BUFFER_USEINLINE 1
 
 #include <isc/buffer.h>
 #include <isc/mem.h>
diff --git a/dns.c b/dns.c
index be16490..fb50710 100644
--- a/dns.c
+++ b/dns.c
@@ -38,7 +38,7 @@
 #include <stdio.h>
 #include <string.h>
 
-#define ISC_BUFFER_USEINLINE
+#define ISC_BUFFER_USEINLINE 1
 
 #include <isc/base64.h>
 #include <isc/buffer.h>
diff --git a/dnsperf.c b/dnsperf.c
index d4f2b32..c9ec210 100644
--- a/dnsperf.c
+++ b/dnsperf.c
@@ -50,7 +50,7 @@
 
 #include <sys/time.h>
 
-#define ISC_BUFFER_USEINLINE
+#define ISC_BUFFER_USEINLINE 1
 
 #include <isc/buffer.h>
 #include <isc/file.h>