diff --git a/accel/tcg/tcg-all.c b/accel/tcg/tcg-all.c
index 7ea7dead16..a81400d3ee 100644
--- a/accel/tcg/tcg-all.c
+++ b/accel/tcg/tcg-all.c
@@ -121,7 +121,7 @@ static int tcg_init_machine(MachineState *ms)
      * There's no guest base to take into account, so go ahead and
      * initialize the prologue now.
      */
-    tcg_prologue_init(tcg_ctx);
+    tcg_prologue_init();
 #endif
 
     return 0;
diff --git a/bsd-user/main.c b/bsd-user/main.c
index 6c9addb75a..7ad406903a 100644
--- a/bsd-user/main.c
+++ b/bsd-user/main.c
@@ -586,7 +586,7 @@ int main(int argc, char **argv)
      * generating the prologue until now so that the prologue can take
      * the real value of GUEST_BASE into account.
      */
-    tcg_prologue_init(tcg_ctx);
+    tcg_prologue_init();
 
     target_cpu_init(env, regs);
 
diff --git a/include/tcg/tcg.h b/include/tcg/tcg.h
index 7743868dc9..2e2d12d421 100644
--- a/include/tcg/tcg.h
+++ b/include/tcg/tcg.h
@@ -784,7 +784,7 @@ static inline void *tcg_malloc(int size)
 
 void tcg_init(size_t tb_size, int splitwx, unsigned max_cpus);
 void tcg_register_thread(void);
-void tcg_prologue_init(TCGContext *s);
+void tcg_prologue_init(void);
 void tcg_func_start(TCGContext *s);
 
 int tcg_gen_code(TCGContext *s, TranslationBlock *tb, uint64_t pc_start);
diff --git a/linux-user/main.c b/linux-user/main.c
index 0a62e2be47..eb66ddec11 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -994,7 +994,7 @@ int main(int argc, char **argv, char **envp)
     /* Now that we've loaded the binary, GUEST_BASE is fixed.  Delay
        generating the prologue until now so that the prologue can take
        the real value of GUEST_BASE into account.  */
-    tcg_prologue_init(tcg_ctx);
+    tcg_prologue_init();
 
     target_cpu_copy_regs(env, regs);
 
diff --git a/tcg/tcg.c b/tcg/tcg.c
index 9256217b8f..e37e5a3b5d 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -1395,8 +1395,9 @@ TranslationBlock *tcg_tb_alloc(TCGContext *s)
     return tb;
 }
 
-void tcg_prologue_init(TCGContext *s)
+void tcg_prologue_init(void)
 {
+    TCGContext *s = tcg_ctx;
     size_t prologue_size;
 
     s->code_ptr = s->code_gen_ptr;