diff --git a/ChangeLog b/ChangeLog
index 5cfff6874..c4e2001cc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2008-03-14  Paolo Bonzini  <bonzini@gnu.org>
+
+	* lightning/i386/core-32.h: Avoid some "value computed is not used"
+	warnings; reported by Sam Steingold.
+
 2008-03-08  Paolo Bonzini  <bonzini@gnu.org>
 
 	* lightning/i386/core-32.h: Fix stxr_c(_EAX, _EBX, _ESI).
diff --git a/lightning/i386/core-32.h b/lightning/i386/core-32.h
index 09e7f5ff0..34c9117ac 100644
--- a/lightning/i386/core-32.h
+++ b/lightning/i386/core-32.h
@@ -54,8 +54,8 @@ struct jit_local_state {
 
 #define jit_allocai_internal(amount, slack)				  \
   (((amount) < _jitl.alloca_slack					  \
-    ? 0									  \
-    : (_jitl.alloca_slack += (amount) + (slack),			  \
+    ? (void)0								  \
+    : (void)(_jitl.alloca_slack += (amount) + (slack),			  \
        ((amount) + (slack) == sizeof (int)				  \
         ? PUSHLr(_EAX)							  \
         : SUBLir((amount) + (slack), _ESP)))),				  \