diff --git a/src/stub/src/amd64-darwin.macho-main.c b/src/stub/src/amd64-darwin.macho-main.c
index 663aaded..18c4471f 100644
--- a/src/stub/src/amd64-darwin.macho-main.c
+++ b/src/stub/src/amd64-darwin.macho-main.c
@@ -423,6 +423,13 @@ typedef struct {
             VM_PROT_EXECUTE = 4
         };
 
+typedef struct {
+    uint32_t cmd;  // LC_MAIN;  MH_EXECUTE only
+    uint32_t cmdsize;  // 24
+    uint64_t entryoff;  // file offset of main() [expected in __TEXT]
+    uint64_t stacksize;  // non-default initial stack size
+} Mach_main_command;
+
 typedef struct {
     uint64_t rax, rbx, rcx, rdx;
     uint64_t rdi, rsi, rbp, rsp;