diff --git a/mlpack.spec b/mlpack.spec
index 07d26e9..65e372b 100644
--- a/mlpack.spec
+++ b/mlpack.spec
@@ -133,7 +133,7 @@ cp %SOURCE1 stb/;
 cp %SOURCE2 stb/;
 
 # Disable Doxygen warnings being fatal.
-sed -i 's/WARN_AS_ERROR          = YES/WARN_AS_ERROR = NO/' CMakeLists.txt;
+sed -i 's/WARN_AS_ERROR          = YES/WARN_AS_ERROR = NO/' Doxyfile;
 
 %build
 %if 0%{?rhel} && 0%{?rhel} <= 7