diff --git a/packages/thapi/fix-lttng-array-types.patch b/packages/thapi/fix-lttng-array-types.patch
new file mode 100644
index 0000000..1e5ec7f
--- /dev/null
+++ b/packages/thapi/fix-lttng-array-types.patch
@@ -0,0 +1,43 @@
+From fe0402c8c6b74504468ed6a788bf80464bfef62a Mon Sep 17 00:00:00 2001
+From: Brice Videau <bvideau@anl.gov>
+Date: Mon, 1 Jul 2024 14:50:38 -0500
+Subject: [PATCH] Fix LTTng array size types.
+
+---
+ utils/meta_parameters.rb | 2 +-
+ utils/yaml_ast_lttng.rb  | 2 ++
+ 2 files changed, 3 insertions(+), 1 deletion(-)
+
+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
diff --git a/packages/thapi/package.py b/packages/thapi/package.py
index 543cf7b..67e6d64 100644
--- a/packages/thapi/package.py
+++ b/packages/thapi/package.py
@@ -53,6 +53,8 @@ class Thapi(AutotoolsPackage):
 
     variant('strict', default=False, description='Enable -Werror during the build')    
     variant('mpi', default=False, description='Enable MPI support for the Sync Daemon')
+
+    patch('fix-lttng-array-types.patch', when='@0.0.8:0.0.11')
     def configure_args(self):
         args = [] 
         args.extend(self.enable_or_disable('mpi'))