diff --git a/src/xrt/ipc/shared/ipcproto/common.py b/src/xrt/ipc/shared/ipcproto/common.py
index fd73c3405..4acdce8bb 100644
--- a/src/xrt/ipc/shared/ipcproto/common.py
+++ b/src/xrt/ipc/shared/ipcproto/common.py
@@ -56,7 +56,8 @@ class Arg:
     SCALAR_TYPES = set(("uint32_t",
                         "int64_t",
                         "uint64_t",
-                        "bool"))
+                        "bool",
+                        "float"))
     AGGREGATE_RE = re.compile(r"((const )?struct|union) (xrt|ipc)_[a-z_]+")
     ENUM_RE = re.compile(r"enum xrt_[a-z_]+")
 
diff --git a/src/xrt/ipc/shared/proto.schema.json b/src/xrt/ipc/shared/proto.schema.json
index c291edabc..9f0653751 100644
--- a/src/xrt/ipc/shared/proto.schema.json
+++ b/src/xrt/ipc/shared/proto.schema.json
@@ -13,7 +13,8 @@
                 "uint32_t",
                 "int64_t",
                 "uint64_t",
-                "bool"
+                "bool",
+                "float"
             ]
         },
         "aggregate": {