diff --git a/ChangeLog b/ChangeLog
index 5d076e44d..24b92cdee 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2013-03-08 Paulo Andrade <pcpa@gnu.org>
+
+	* check/lightning.c: Add missing ppc preprocessor definition.
+
 2013-03-06 Paulo Andrade <pcpa@gnu.org>
 
 	* check/float.tst: Comment out the int to negative infinity
diff --git a/check/lightning.c b/check/lightning.c
index 24e5240cb..439aedef0 100644
--- a/check/lightning.c
+++ b/check/lightning.c
@@ -3960,6 +3960,11 @@ main(int argc, char *argv[])
 			  sizeof(cmdline) - opt_short,
 			  " -D__arm__=1");
 #endif
+#if defined(__ppc__) || defined(__powerpc__)
+    opt_short += snprintf(cmdline + opt_short,
+			  sizeof(cmdline) - opt_short,
+			  " -D__ppc__=1");
+#endif
 #if defined(__sparc__)
     opt_short += snprintf(cmdline + opt_short,
 			  sizeof(cmdline) - opt_short,