display: divide by billion for G
diff --git a/display.c b/display.c
index ea1b95f..0f77efe 100644
--- a/display.c
+++ b/display.c
@@ -60,7 +60,7 @@
 static void display_printKMG(uint64_t val)
 {
     if (val >= 1000000000UL) {
-        display_put(" [%.2lfG]", (double)val / 1000000.0);
+        display_put(" [%.2lfG]", (double)val / 1000000000.0);
     } else if (val >= 1000000UL) {
         display_put(" [%.2lfM]", (double)val / 1000000.0);
     } else if (val >= 1000UL) {