diff --git a/gfx/src/cairo/Makefile.in b/gfx/src/cairo/Makefile.in
index 6a459412386e..c95d8d323145 100644
--- a/gfx/src/cairo/Makefile.in
+++ b/gfx/src/cairo/Makefile.in
@@ -53,7 +53,7 @@ LIBXUL_LIBRARY = 1
 
 REQUIRES =  xpcom \
             string \
-	    cairo \
+            cairo \
             libpixman \
             gfx \
             widget \