diff --git a/GraphicsMagick.spec b/GraphicsMagick.spec
index 5db7e0c..49f82eb 100644
--- a/GraphicsMagick.spec
+++ b/GraphicsMagick.spec
@@ -1,5 +1,7 @@
 
+%if 0%{?fedora} > 15 || 0%{?rhel} > 6
 %global quantum_depth 16
+%endif
 
 %if 0%{?fedora} > 16
 %global lcms lcms2