diff --git a/dix/grabs.c b/dix/grabs.c
index addc4a09c..1fe061c6d 100644
--- a/dix/grabs.c
+++ b/dix/grabs.c
@@ -67,6 +67,10 @@ SOFTWARE.
 #include "exglobals.h"
 #include "inpututils.h"
 
+#define MasksPerDetailMask 8    /* 256 keycodes and 256 possible
+                                   modifier combinations, but only
+                                   3 buttons. */
+
 #define BITMASK(i) (((Mask)1) << ((i) & 31))
 #define MASKIDX(i) ((i) >> 5)
 #define MASKWORD(buf, i) buf[MASKIDX(i)]
diff --git a/include/inputstr.h b/include/inputstr.h
index c3bbfbe08..aa4c9a37f 100644
--- a/include/inputstr.h
+++ b/include/inputstr.h
@@ -157,10 +157,6 @@ typedef struct _OtherInputMasks {
  * keyboard/pointer device) going at once in the server.
  */
 
-#define MasksPerDetailMask 8    /* 256 keycodes and 256 possible
-                                   modifier combinations, but only
-                                   3 buttons. */
-
 typedef struct _DetailRec {     /* Grab details may be bit masks */
     unsigned int exact;
     Mask *pMask;