diff --git a/utils/meta_parameters.rb b/utils/meta_parameters.rb
index d0c217ed..2c3be8c7 100644
--- a/utils/meta_parameters.rb
+++ b/utils/meta_parameters.rb
@@ -217,7 +217,7 @@ def initialize(command, name, size)
       size = "*#{size}"
       size = "(#{size} < 0 ? 0 : (size_t)#{size})" if INT_SIGN_MAP["#{s.type.type}"]
       sz = sanitize_expression("#{size}", checks)
-      st = INT_SIGN_MAP["#{s.type.type}"] ? "size_t"  : "#{s.type}"
+      st = INT_SIGN_MAP["#{s.type.type}"] ? "size_t"  : "#{s.type.type}"
     else
       checks = check_for_null("#{name}")
       size = "(#{size} < 0 ? 0 : (size_t)#{size})" if INT_SIGN_MAP["#{s.type}"]
diff --git a/utils/yaml_ast_lttng.rb b/utils/yaml_ast_lttng.rb
index acce44aa..6016dabc 100644
--- a/utils/yaml_ast_lttng.rb
+++ b/utils/yaml_ast_lttng.rb
@@ -184,6 +184,7 @@ def lttng_type(length: nil, length_type: nil)
           ev.type = :uint8_t
           if ev.length
             ev.length = "(#{ev.length}) * sizeof(uint8_t)"
+            ev.length_type = "size_t"
           end
         when *OBJECT_TYPES, *POINTER_TYPES
           ev.macro = :"ctf_#{lttng_arr_type}_hex"
@@ -202,6 +203,7 @@ def lttng_type(length: nil, length_type: nil)
           ev.type = :uint8_t
           if ev.length
             ev.length = "(#{ev.length}) * sizeof(#{type.name})"
+            ev.length_type = "size_t"
           end
         else
           super