diff --git a/testhal/STM32/STM32F30x/USB_CDC_IAD/Makefile b/testhal/STM32/STM32F30x/USB_CDC_IAD/Makefile
index b5e2e4d22..dc79d9cb1 100644
--- a/testhal/STM32/STM32F30x/USB_CDC_IAD/Makefile
+++ b/testhal/STM32/STM32F30x/USB_CDC_IAD/Makefile
@@ -135,7 +135,7 @@ ASMSRC = $(PORTASM)
 
 INCDIR = $(PORTINC) $(KERNINC) $(TESTINC) \
          $(HALINC) $(OSALINC) $(PLATFORMINC) $(BOARDINC) \
-         $(CHIBIOS)/os/various
+         $(CHIBIOS)/os/hal/lib/streams $(CHIBIOS)/os/various
 
 #
 # Project, sources and paths
diff --git a/testhal/STM32/STM32F4xx/USB_CDC_IAD/Makefile b/testhal/STM32/STM32F4xx/USB_CDC_IAD/Makefile
index abd79278e..94318a1d3 100644
--- a/testhal/STM32/STM32F4xx/USB_CDC_IAD/Makefile
+++ b/testhal/STM32/STM32F4xx/USB_CDC_IAD/Makefile
@@ -135,7 +135,7 @@ ASMSRC = $(PORTASM)
 
 INCDIR = $(PORTINC) $(KERNINC) $(TESTINC) \
          $(HALINC) $(OSALINC) $(PLATFORMINC) $(BOARDINC) \
-         $(CHIBIOS)/os/various
+         $(CHIBIOS)/os/hal/lib/streams $(CHIBIOS)/os/various
 
 #
 # Project, sources and paths