diff --git a/tools/net/ynl/ynl-gen-c.py b/tools/net/ynl/ynl-gen-c.py
index c78f1c1bca75..ce6b52ca011b 100755
--- a/tools/net/ynl/ynl-gen-c.py
+++ b/tools/net/ynl/ynl-gen-c.py
@@ -2406,6 +2406,7 @@ def uapi_enum_start(family, cw, obj, ckey='', enum_name='enum-name'):
 
 def render_uapi(family, cw):
     hdr_prot = f"_UAPI_LINUX_{c_upper(family.uapi_header_name)}_H"
+    hdr_prot = hdr_prot.replace('/', '_')
     cw.p('#ifndef ' + hdr_prot)
     cw.p('#define ' + hdr_prot)
     cw.nl()