diff --git a/src/mesa/drivers/osmesa/Makefile.am b/src/mesa/drivers/osmesa/Makefile.am
index d09c18eed31..4935335e291 100644
--- a/src/mesa/drivers/osmesa/Makefile.am
+++ b/src/mesa/drivers/osmesa/Makefile.am
@@ -29,8 +29,6 @@ AM_CPPFLAGS = \
 	$(DEFINES)
 AM_CFLAGS = $(PTHREAD_CFLAGS) \
 	$(VISIBILITY_CFLAGS)
-AM_CXXFLAGS = $(PTHREAD_CFLAGS) \
-	$(VISIBILITY_CXXFLAGS)
 
 lib_LTLIBRARIES = lib@OSMESA_LIB@.la