diff --git a/ports/unix/Makefile b/ports/unix/Makefile
index cbdd3f3fbe..b17b012e00 100644
--- a/ports/unix/Makefile
+++ b/ports/unix/Makefile
@@ -249,7 +249,7 @@ coverage:
 	    -DMICROPY_UNIX_COVERAGE' \
 	    LDFLAGS_EXTRA='-fprofile-arcs -ftest-coverage' \
 	    FROZEN_DIR=coverage-frzstr FROZEN_MPY_DIR=coverage-frzmpy \
-	    BUILD=build-coverage PROG=micropython_coverage
+	    BUILD=build-coverage PROG=micropython_coverage axtls all
 
 coverage_test: coverage
 	$(eval DIRNAME=ports/$(notdir $(CURDIR)))