diff --git a/src/Makefile.am b/src/Makefile.am
index aa4dfdd..1291045 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -56,15 +56,15 @@ GENERATED_GL_INCLUDES = \
 	$()
 
 GENERATED_GLX_INCLUDES = \
-	$(tuilddir)/../include/epoxy/glx_generated.h \
+	$(builddir)/../include/epoxy/glx_generated.h \
 	$()
 
 GENERATED_EGL_INCLUDES = \
-	$(tuilddir)/../include/epoxy/egl_generated.h \
+	$(builddir)/../include/epoxy/egl_generated.h \
 	$()
 
 GENERATED_WGL_INCLUDES = \
-	$(tuilddir)/../include/epoxy/wgl_generated.h \
+	$(builddir)/../include/epoxy/wgl_generated.h \
 	$()
 
 GENERATED_GL_SOURCE = gl_generated_dispatch.c