diff --git a/libtcc.c b/libtcc.c
index d367ed1..827d3c0 100644
--- a/libtcc.c
+++ b/libtcc.c
@@ -117,7 +117,7 @@ static void tcc_add_systemdir(TCCState *s)
 #endif
 
 #ifndef CONFIG_TCC_STATIC
-void dlclose(void *p)
+static void dlclose(void *p)
 {
     FreeLibrary((HMODULE)p);
 }
@@ -135,7 +135,7 @@ BOOL WINAPI DllMain (HINSTANCE hDll, DWORD dwReason, LPVOID lpReserved)
 
 /********************************************************/
 /* copy a string and truncate it. */
-PUB_FUNC char *pstrcpy(char *buf, int buf_size, const char *s)
+ST_FUNC char *pstrcpy(char *buf, int buf_size, const char *s)
 {
     char *q, *q_end;
     int c;
diff --git a/tcc.h b/tcc.h
index 74a4c20..20846a3 100644
--- a/tcc.h
+++ b/tcc.h
@@ -1167,7 +1167,7 @@ ST_DATA struct TCCState *tcc_state;
 #define AFF_PREPROCESS      0x0004 /* preprocess file */
 
 /* public functions currently used by the tcc main function */
-PUB_FUNC char *pstrcpy(char *buf, int buf_size, const char *s);
+ST_FUNC char *pstrcpy(char *buf, int buf_size, const char *s);
 ST_FUNC char *pstrcat(char *buf, int buf_size, const char *s);
 ST_FUNC char *pstrncpy(char *out, const char *in, size_t num);
 PUB_FUNC char *tcc_basename(const char *name);
diff --git a/tccpe.c b/tccpe.c
index 2484e4f..4069e51 100644
--- a/tccpe.c
+++ b/tccpe.c
@@ -58,6 +58,7 @@
 
 #endif
 
+#if 0
 #ifdef _WIN32
 void dbg_printf (const char *fmt, ...)
 {
@@ -70,6 +71,7 @@ void dbg_printf (const char *fmt, ...)
     OutputDebugString(buffer);
 }
 #endif
+#endif
 
 /* ----------------------------------------------------------- */
 #ifndef IMAGE_NT_SIGNATURE
diff --git a/win32/tools/tiny_impdef.c b/win32/tools/tiny_impdef.c
index 48de44f..b6debe6 100644
--- a/win32/tools/tiny_impdef.c
+++ b/win32/tools/tiny_impdef.c
@@ -28,7 +28,7 @@
 #include <io.h>
 #include <malloc.h>
 
-char *get_export_names(int fd);
+static char *get_export_names(int fd);
 #define tcc_free free
 #define tcc_realloc realloc
 
@@ -169,7 +169,7 @@ int read_mem(int fd, unsigned offset, void *buffer, unsigned len)
 /* -------------------------------------------------------------- */
 #endif
 
-char *get_export_names(int fd)
+static char *get_export_names(int fd)
 {
     int l, i, n, n0;
     char *p;