diff --git a/smoketestoo_native/makefile.mk b/smoketestoo_native/makefile.mk
index 1a0df1f0df0f..6171aa132241 100644
--- a/smoketestoo_native/makefile.mk
+++ b/smoketestoo_native/makefile.mk
@@ -31,6 +31,10 @@ ENABLE_EXCEPTIONS = TRUE
 
 .INCLUDE: settings.mk
 
+.IF "$(SYSTEM_CPPUNIT)"=="YES"
+CFLAGS+= $(CPPUNIT_CFLAGS)
+.ENDIF
+
 SLOFILES = $(SHL1OBJS)
 
 SHL1TARGET = smoketest
diff --git a/test/source/cpp/makefile.mk b/test/source/cpp/makefile.mk
index 3d7db10abdf3..a22eba557cf6 100644
--- a/test/source/cpp/makefile.mk
+++ b/test/source/cpp/makefile.mk
@@ -34,6 +34,10 @@ VISIBILITY_HIDDEN = TRUE
 
 CDEFS += -DOOO_DLLIMPLEMENTATION_TEST
 
+.IF "$(SYSTEM_CPPUNIT)"=="YES"
+CFLAGS += $(CPPUNIT_CFLAGS)
+.ENDIF
+
 SLOFILES = \
     $(SLO)/getargument.obj \
     $(SLO)/officeconnection.obj \