diff --git a/package/boost/boost.mk b/package/boost/boost.mk
index 3bc5a451ab..3bd1e8d2c7 100644
--- a/package/boost/boost.mk
+++ b/package/boost/boost.mk
@@ -67,7 +67,7 @@ ifeq ($(BR2_PACKAGE_BOOST_PYTHON),y)
 BOOST_FLAGS += --with-python-root=$(HOST_DIR)
 ifeq ($(BR2_PACKAGE_PYTHON3),y)
 BOOST_FLAGS += --with-python=$(HOST_DIR)/bin/python$(PYTHON3_VERSION_MAJOR)
-BOOST_TARGET_CXXFLAGS += -I$(STAGING_DIR)/usr/include/python$(PYTHON3_VERSION_MAJOR)m
+BOOST_TARGET_CXXFLAGS += -I$(STAGING_DIR)/usr/include/python$(PYTHON3_VERSION_MAJOR)
 BOOST_DEPENDENCIES += python3
 else
 BOOST_FLAGS += --with-python=$(HOST_DIR)/bin/python$(PYTHON_VERSION_MAJOR)