diff --git a/conf/Makefile.linux b/conf/Makefile.linux
index 830d508683..6e621cacb8 100644
--- a/conf/Makefile.linux
+++ b/conf/Makefile.linux
@@ -128,9 +128,8 @@ $(OBJDIR)/%.o : %.cpp $(OBJDIR)/../Makefile.ac
 #
 # Dependencies
 #
-
-DEPS = $(addprefix $(OBJDIR)/,$($(TARGET).srcs:.c=.d))
-
 ifneq ($(MAKECMDGOALS),clean)
+DEPS = $(addprefix $(OBJDIR)/,$($(TARGET).srcs:.c=.d))
+DEPS += $(addprefix $(OBJDIR)/,$($(TARGET).srcs:.cpp=.d))
 -include $(DEPS)
 endif
diff --git a/conf/Makefile.nps b/conf/Makefile.nps
index b0a5b0e864..18a585017e 100644
--- a/conf/Makefile.nps
+++ b/conf/Makefile.nps
@@ -105,5 +105,6 @@ $(OBJDIR)/%.o: %.cpp $(OBJDIR)/../Makefile.ac
 #
 ifneq ($(MAKECMDGOALS),clean)
 DEPS = $(addprefix $(OBJDIR)/,$($(TARGET).srcs:.c=.d))
+DEPS += $(addprefix $(OBJDIR)/,$($(TARGET).srcs:.cpp=.d))
 -include $(DEPS)
 endif