diff --git a/lib/lib-arm64.c b/lib/lib-arm64.c
index bff1d91a..42d5936d 100644
--- a/lib/lib-arm64.c
+++ b/lib/lib-arm64.c
@@ -12,7 +12,7 @@
 #include <stdint.h>
 #include <string.h>
 
-void __clear_cache(char *beg, char *end)
+void __clear_cache(void *beg, void *end)
 {
     __arm64_clear_cache(beg, end);
 }
diff --git a/lib/libtcc1.c b/lib/libtcc1.c
index ece6413b..17e410d5 100644
--- a/lib/libtcc1.c
+++ b/lib/libtcc1.c
@@ -721,7 +721,7 @@ void *__va_arg(__va_list_struct *ap,
 /* Flushing for tccrun */
 #if defined(TCC_TARGET_X86_64) || defined(TCC_TARGET_I386)
 
-void __clear_cache(char *beginning, char *end)
+void __clear_cache(void *beginning, void *end)
 {
 }
 
@@ -732,7 +732,7 @@ void __clear_cache(char *beginning, char *end)
 #include <sys/syscall.h>
 #include <stdio.h>
 
-void __clear_cache(char *beginning, char *end)
+void __clear_cache(void *beginning, void *end)
 {
 /* __ARM_NR_cacheflush is kernel private and should not be used in user space.
  * However, there is no ARM asm parser in tcc so we use it for now */
diff --git a/tccrun.c b/tccrun.c
index 55db3109..f348e486 100644
--- a/tccrun.c
+++ b/tccrun.c
@@ -226,7 +226,7 @@ static void set_pages_executable(void *ptr, unsigned long length)
     unsigned long old_protect;
     VirtualProtect(ptr, length, PAGE_EXECUTE_READWRITE, &old_protect);
 #else
-    extern void __clear_cache(char *beginning, char *end);
+    extern void __clear_cache(void *beginning, void *end);
 #ifndef PAGESIZE
 # define PAGESIZE 4096
 #endif