diff --git a/src/jltypes.c b/src/jltypes.c
index 0767e9493bbc0..e7c1fd9d9c9c2 100644
--- a/src/jltypes.c
+++ b/src/jltypes.c
@@ -2600,7 +2600,7 @@ void jl_init_types(void) JL_GC_DISABLED
     jl_method_type =
         jl_new_datatype(jl_symbol("Method"), core,
                         jl_any_type, jl_emptysvec,
-                        jl_perm_symsvec(29,
+                        jl_perm_symsvec(30,
                             "name",
                             "module",
                             "file",
@@ -2629,8 +2629,9 @@ void jl_init_types(void) JL_GC_DISABLED
                             "pure",
                             "is_for_opaque_closure",
                             "constprop",
-                            "purity"),
-                        jl_svec(29,
+                            "purity",
+                            "num_dynamic_dispatches"),
+                        jl_svec(30,
                             jl_symbol_type,
                             jl_module_type,
                             jl_symbol_type,
@@ -2659,7 +2660,8 @@ void jl_init_types(void) JL_GC_DISABLED
                             jl_bool_type,
                             jl_bool_type,
                             jl_uint8_type,
-                            jl_uint8_type),
+                            jl_uint8_type,
+                            jl_int32_type),
                         jl_emptysvec,
                         0, 1, 10);
     //const static uint32_t method_constfields[1] = { 0x03fc065f }; // (1<<0)|(1<<1)|(1<<2)|(1<<3)|(1<<4)|(1<<6)|(1<<9)|(1<<10)|(1<<18)|(1<<19)|(1<<20)|(1<<21)|(1<<22)|(1<<23)|(1<<24)|(1<<25);
diff --git a/src/julia.h b/src/julia.h
index 7ac44cbacfef3..136cb5a968ba9 100644
--- a/src/julia.h
+++ b/src/julia.h
@@ -349,12 +349,13 @@ typedef struct _jl_method_t {
     // forcing the conclusion to always true.
     _jl_purity_overrides_t purity;
 
-// hidden fields:
-    // lock for modifications to the method
-    jl_mutex_t writelock;
 #ifdef JL_DISPATCH_LOG_BOXES
     uint32_t num_dynamic_dispatches;
 #endif
+
+// hidden fields:
+    // lock for modifications to the method
+    jl_mutex_t writelock;
 } jl_method_t;
 
 // This type is a placeholder to cache data for a specType signature specialization of a Method
diff --git a/src/method.c b/src/method.c
index a659b9aa44d56..c5e595fa75719 100644
--- a/src/method.c
+++ b/src/method.c
@@ -805,10 +805,10 @@ JL_DLLEXPORT jl_method_t *jl_new_method_uninit(jl_module_t *module)
     m->deleted_world = ~(size_t)0;
     m->is_for_opaque_closure = 0;
     m->constprop = 0;
-    JL_MUTEX_INIT(&m->writelock);
 #ifdef JL_DISPATCH_LOG_BOXES
     m->num_dynamic_dispatches = 0;
 #endif
+    JL_MUTEX_INIT(&m->writelock);
     return m;
 }