diff --git a/coroutine/win32/Context.h b/coroutine/win32/Context.h
index 95b4ccdba1..c4f041f501 100644
--- a/coroutine/win32/Context.h
+++ b/coroutine/win32/Context.h
@@ -19,10 +19,10 @@ extern "C" {
 /* This doesn't include thread information block */
 const size_t COROUTINE_REGISTERS = 4;
 
-struct coroutine_context
+typedef struct
 {
 	void **stack_pointer;
-};
+} coroutine_context;
 
 typedef void(__fastcall * coroutine_start)(coroutine_context *from, coroutine_context *self);
 
diff --git a/coroutine/win64/Context.h b/coroutine/win64/Context.h
index b3afed691f..a72ce530f8 100644
--- a/coroutine/win64/Context.h
+++ b/coroutine/win64/Context.h
@@ -19,10 +19,10 @@ extern "C" {
 const size_t COROUTINE_REGISTERS = 8;
 const size_t COROUTINE_XMM_REGISTERS = 1+10*2;
 
-struct coroutine_context
+typedef struct
 {
 	void **stack_pointer;
-};
+} coroutine_context;
 
 typedef void(* coroutine_start)(coroutine_context *from, coroutine_context *self);