diff --git a/meson.build b/meson.build
index 3585117..9964892 100644
--- a/meson.build
+++ b/meson.build
@@ -36,7 +36,7 @@ endif
 
 libdrm_include_dir = dependency('libdrm').get_variable(pkgconfig: 'includedir')
 
-c_args += '-I' + libdrm_include_dir
+c_args += '-I=' + libdrm_include_dir
 
 add_project_arguments(c_args, language: 'c')