diff --git a/.github/workflows/rjit-bindgen.yml b/.github/workflows/rjit-bindgen.yml
index e7a030f599..316918da4d 100644
--- a/.github/workflows/rjit-bindgen.yml
+++ b/.github/workflows/rjit-bindgen.yml
@@ -83,7 +83,7 @@ jobs:
           payload: |
             {
               "ci": "GitHub Actions",
-              "env": "${{ matrix.os }} / ${{ matrix.test_task }}${{ matrix.configure }}",
+              "env": "RJIT / bindgen",
               "url": "https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}",
               "commit": "${{ github.sha }}",
               "branch": "${{ github.ref_name }}"
diff --git a/rjit_c.rb b/rjit_c.rb
index e201cd51df..cf8284cd7b 100644
--- a/rjit_c.rb
+++ b/rjit_c.rb
@@ -962,7 +962,7 @@ module RubyVM::RJIT # :nodoc: all
       ), Primitive.cexpr!("OFFSETOF((*((struct rb_iseq_constant_body *)NULL)), mark_bits)")],
       outer_variables: [CType::Pointer.new { self.rb_id_table }, Primitive.cexpr!("OFFSETOF((*((struct rb_iseq_constant_body *)NULL)), outer_variables)")],
       mandatory_only_iseq: [CType::Pointer.new { self.rb_iseq_t }, Primitive.cexpr!("OFFSETOF((*((struct rb_iseq_constant_body *)NULL)), mandatory_only_iseq)")],
-      jit_func: [CType::Immediate.parse("void *"), Primitive.cexpr!("OFFSETOF((*((struct rb_iseq_constant_body *)NULL)), jit_func)")],
+      jit_func: [self.rb_jit_func_t, Primitive.cexpr!("OFFSETOF((*((struct rb_iseq_constant_body *)NULL)), jit_func)")],
       total_calls: [CType::Immediate.parse("unsigned long"), Primitive.cexpr!("OFFSETOF((*((struct rb_iseq_constant_body *)NULL)), total_calls)")],
       rjit_blocks: [self.VALUE, Primitive.cexpr!("OFFSETOF((*((struct rb_iseq_constant_body *)NULL)), rjit_blocks)"), true],
     )
@@ -1007,6 +1007,10 @@ module RubyVM::RJIT # :nodoc: all
     @rb_iseq_t ||= self.rb_iseq_struct
   end
 
+  def C.rb_jit_func_t
+    @rb_jit_func_t ||= CType::Immediate.parse("void *")
+  end
+
   def C.rb_method_attr_t
     @rb_method_attr_t ||= CType::Struct.new(
       "rb_method_attr_struct", Primitive.cexpr!("SIZEOF(struct rb_method_attr_struct)"),
diff --git a/tool/rjit/bindgen.rb b/tool/rjit/bindgen.rb
index e201f3504e..292f7e4b9c 100755
--- a/tool/rjit/bindgen.rb
+++ b/tool/rjit/bindgen.rb
@@ -563,6 +563,7 @@ generator = BindingGenerator.new(
     rb_shape
     rb_shape_t
     rb_thread_struct
+    rb_jit_func_t
     rjit_options
   ],
   # #ifdef-dependent immediate types, which need Primitive.cexpr! for type detection