diff --git a/common/xrdp_constants.h b/common/xrdp_constants.h
index 82b4c059..6b89a0dc 100644
--- a/common/xrdp_constants.h
+++ b/common/xrdp_constants.h
@@ -287,6 +287,9 @@
 #define RDP_CAPSET_MULTIFRAGMENT       0x001A
 #define RDP_CAPLEN_MULTIFRAGMENT       0x08
 
+#define RDP_CAPSET_FRAME_ACKNOWLEDGE   0x001E
+#define RDP_CAPLEN_FRAME_ACKNOWLEDGE   0x08
+
 #define RDP_SOURCE                     "MSTSC"
 
 /* Logon flags */
diff --git a/libxrdp/xrdp_caps.c b/libxrdp/xrdp_caps.c
index 237370e9..26a6eebc 100644
--- a/libxrdp/xrdp_caps.c
+++ b/libxrdp/xrdp_caps.c
@@ -926,14 +926,14 @@ xrdp_caps_send_demand_active(struct xrdp_rdp *self)
     {
         /* multifragment update */
         caps_count++;
-        out_uint16_le(s, 0x001A); /* 26 CAPSETTYPE_MULTIFRAGMENTUPDATE */
-        out_uint16_le(s, 8);
+        out_uint16_le(s, RDP_CAPSET_MULTIFRAGMENT); /* 26 CAPSETTYPE_MULTIFRAGMENTUPDATE */
+        out_uint16_le(s, RDP_CAPLEN_MULTIFRAGMENT);
         out_uint32_le(s, 3 * 1024 * 1024); /* 3MB */
 
         /* frame acks */
         caps_count++;
-        out_uint16_le(s, 0x001E); /* CAPSETTYPE_FRAME_ACKNOWLEDGE */
-        out_uint16_le(s, 8);
+        out_uint16_le(s, RDP_CAPSET_FRAME_ACKNOWLEDGE); /* CAPSETTYPE_FRAME_ACKNOWLEDGE */
+        out_uint16_le(s, RDP_CAPLEN_FRAME_ACKNOWLEDGE);
         out_uint32_le(s, 2); /* 2 frames in flight */
 
         /* surface commands */