diff --git a/Makefile b/Makefile
index a3446b0..db9178f 100644
--- a/Makefile
+++ b/Makefile
@@ -4,15 +4,18 @@ Q := @
 endif
 
 PC_HOSTED =
+NO_LIBOPENCM3 =
 ifeq ($(PROBE_HOST), libftdi)
 	PC_HOSTED = true
+	NO_LIBOPENCM3 = true
 endif
 ifeq ($(PROBE_HOST), pc-stlinkv2)
 	PC_HOSTED = true
+	NO_LIBOPENCM3 = true
 endif
 
 all:
-ifndef 	PC_HOSTED
+ifndef NO_LIBOPENCM3
 	$(Q)if [ ! -f libopencm3/Makefile ]; then \
 		echo "Initialising git submodules..." ;\
 		git submodule init ;\
@@ -23,7 +26,7 @@ endif
 	$(Q)$(MAKE) $(MFLAGS) -C src
 
 clean:
-ifndef 	PC_HOSTED
+ifndef NO_LIBOPENCM3
 	$(Q)$(MAKE) $(MFLAGS) -C libopencm3 $@
 endif
 	$(Q)$(MAKE) $(MFLAGS) -C src $@
diff --git a/src/include/gdb_if.h b/src/include/gdb_if.h
index d2ad243..1dc9e28 100644
--- a/src/include/gdb_if.h
+++ b/src/include/gdb_if.h
@@ -21,7 +21,7 @@
 #ifndef __GDB_IF_H
 #define __GDB_IF_H
 
-#if !defined(PC_HOSTED)
+#if !defined(NO_LIBOPENCM3)
 #include <libopencm3/usb/usbd.h>
 void gdb_usb_out_cb(usbd_device *dev, uint8_t ep);
 #endif
diff --git a/src/platforms/libftdi/Makefile.inc b/src/platforms/libftdi/Makefile.inc
index 06c07d7..0ddabe8 100644
--- a/src/platforms/libftdi/Makefile.inc
+++ b/src/platforms/libftdi/Makefile.inc
@@ -1,5 +1,5 @@
 SYS = $(shell $(CC) -dumpmachine)
-CFLAGS += -DPC_HOSTED -DENABLE_DEBUG
+CFLAGS += -DPC_HOSTED -DNO_LIBOPENCM3 -DENABLE_DEBUG
 LDFLAGS += -lftdi1
 ifneq (, $(findstring mingw, $(SYS)))
 LDFLAGS +=  -lusb-1.0 -lws2_32
diff --git a/src/platforms/pc-stlinkv2/Makefile.inc b/src/platforms/pc-stlinkv2/Makefile.inc
index 53ec16a..8762885 100644
--- a/src/platforms/pc-stlinkv2/Makefile.inc
+++ b/src/platforms/pc-stlinkv2/Makefile.inc
@@ -1,6 +1,6 @@
 TARGET=blackmagic_stlinkv2
 SYS = $(shell $(CC) -dumpmachine)
-CFLAGS += -DPC_HOSTED  -DSTLINKV2 -DJTAG_HL -DENABLE_DEBUG
+CFLAGS += -DPC_HOSTED -DNO_LIBOPENCM3 -DSTLINKV2 -DJTAG_HL -DENABLE_DEBUG
 CFLAGS +=-I ./target
 LDFLAGS += -lusb-1.0
 ifneq (, $(findstring mingw, $(SYS)))