diff --git a/os/common/startup/ARMCMx/compilers/GCC/mk/startup_tm4c123x.mk b/os/common/startup/ARMCMx/compilers/GCC/mk/startup_tm4c123x.mk
index e9c97e5f..263338ad 100644
--- a/os/common/startup/ARMCMx/compilers/GCC/mk/startup_tm4c123x.mk
+++ b/os/common/startup/ARMCMx/compilers/GCC/mk/startup_tm4c123x.mk
@@ -6,6 +6,7 @@ STARTUPASM = $(CHIBIOS)/os/common/startup/ARMCMx/compilers/GCC/crt0_v7m.S
 
 STARTUPINC = $(CHIBIOS)/os/common/startup/ARMCMx/compilers/GCC \
              $(CHIBIOS_CONTRIB)/os/common/startup/ARMCMx/devices/TM4C123x \
-             $(CHIBIOS)/os/common/ext/CMSIS/include
+             $(CHIBIOS)/os/common/ext/CMSIS/include \
+             $(CHIBIOS_CONTRIB)/os/common/ext/TivaWare
 
 STARTUPLD  = $(CHIBIOS_CONTRIB)/os/common/startup/ARMCMx/compilers/GCC/ld
diff --git a/os/common/startup/ARMCMx/compilers/GCC/mk/startup_tm4c129x.mk b/os/common/startup/ARMCMx/compilers/GCC/mk/startup_tm4c129x.mk
index e151434e..6cf42f76 100644
--- a/os/common/startup/ARMCMx/compilers/GCC/mk/startup_tm4c129x.mk
+++ b/os/common/startup/ARMCMx/compilers/GCC/mk/startup_tm4c129x.mk
@@ -6,6 +6,7 @@ STARTUPASM = $(CHIBIOS)/os/common/startup/ARMCMx/compilers/GCC/crt0_v7m.S
 
 STARTUPINC = $(CHIBIOS)/os/common/startup/ARMCMx/compilers/GCC \
              $(CHIBIOS_CONTRIB)/os/common/startup/ARMCMx/devices/TM4C129x \
-             $(CHIBIOS)/os/common/ext/CMSIS/include
+             $(CHIBIOS)/os/common/ext/CMSIS/include \
+             $(CHIBIOS_CONTRIB)/os/common/ext/TivaWare
 
 STARTUPLD  = $(CHIBIOS_CONTRIB)/os/common/startup/ARMCMx/compilers/GCC/ld