diff --git a/makefile b/makefile
index 3c2406b..085e60c 100644
--- a/makefile
+++ b/makefile
@@ -40,14 +40,9 @@ OBJECTS	= $(OBJ) hwstamp_ctl.o nsm.o phc2sys.o phc_ctl.o pmc.o pmc_agent.o \
 SRC	= $(OBJECTS:.o=.c)
 DEPEND	= $(OBJECTS:.o=.d)
 srcdir	:= $(dir $(lastword $(MAKEFILE_LIST)))
-incdefs := $(shell CC="$(CC)" $(srcdir)/incdefs.sh)
 version := $(shell $(srcdir)/version.sh $(srcdir))
 VPATH	= $(srcdir)
 
-ifeq (,$(findstring -DUSE_OPENSSL, $(EXTRA_CFLAGS)))
-incdefs := $(filter-out -DHAVE_OPENSSL, $(incdefs))
-endif
-
 ifneq (,$(findstring -DHAVE_NETTLE, $(incdefs)))
 LDLIBS += -lnettle
 SECURITY += sad_nettle.o