diff --git a/py/mkenv.mk b/py/mkenv.mk
index 46eedf988a..0a59c2ac74 100644
--- a/py/mkenv.mk
+++ b/py/mkenv.mk
@@ -49,6 +49,7 @@ PYTHON = python3
 AS = $(CROSS_COMPILE)as
 CC = $(CROSS_COMPILE)gcc
 CXX = $(CROSS_COMPILE)g++
+GDB = $(CROSS_COMPILE)gdb
 LD = $(CROSS_COMPILE)ld
 OBJCOPY = $(CROSS_COMPILE)objcopy
 SIZE = $(CROSS_COMPILE)size