diff --git a/package/python-sip/python-sip.mk b/package/python-sip/python-sip.mk
index 69019f5f19..1d6c205396 100644
--- a/package/python-sip/python-sip.mk
+++ b/package/python-sip/python-sip.mk
@@ -21,7 +21,7 @@ else ifeq ($(BR2_PACKAGE_PYTHON3),y)
 PYTHON_SIP_DEPENDENCIES += python3
 HOST_PYTHON_SIP_DEPENDENCIES += host-python3
 PYTHON_SIP_LIB_DIR = usr/lib/python$(PYTHON3_VERSION_MAJOR)/site-packages
-PYTHON_SIP_INCLUDE_DIR = usr/include/python$(PYTHON3_VERSION_MAJOR)m
+PYTHON_SIP_INCLUDE_DIR = usr/include/python$(PYTHON3_VERSION_MAJOR)
 endif
 
 define HOST_PYTHON_SIP_CONFIGURE_CMDS