diff --git a/src/include/port.h b/src/include/port.h
index ce5da0534e8..fe48618df7b 100644
--- a/src/include/port.h
+++ b/src/include/port.h
@@ -204,13 +204,13 @@ extern unsigned char pg_ascii_tolower(unsigned char ch);
 #undef printf
 #endif
 
-extern int	pg_vsnprintf(char *str, size_t count, const char *fmt, va_list args);
+extern int	pg_vsnprintf(char *str, size_t count, const char *fmt, va_list args) pg_attribute_printf(3, 0);
 extern int	pg_snprintf(char *str, size_t count, const char *fmt,...) pg_attribute_printf(3, 4);
-extern int	pg_vsprintf(char *str, const char *fmt, va_list args);
+extern int	pg_vsprintf(char *str, const char *fmt, va_list args) pg_attribute_printf(2, 0);
 extern int	pg_sprintf(char *str, const char *fmt,...) pg_attribute_printf(2, 3);
-extern int	pg_vfprintf(FILE *stream, const char *fmt, va_list args);
+extern int	pg_vfprintf(FILE *stream, const char *fmt, va_list args) pg_attribute_printf(2, 0);
 extern int	pg_fprintf(FILE *stream, const char *fmt,...) pg_attribute_printf(2, 3);
-extern int	pg_vprintf(const char *fmt, va_list args);
+extern int	pg_vprintf(const char *fmt, va_list args) pg_attribute_printf(1, 0);
 extern int	pg_printf(const char *fmt,...) pg_attribute_printf(1, 2);
 
 /*
diff --git a/src/port/win32security.c b/src/port/win32security.c
index 1235199f2fb..281244a34fb 100644
--- a/src/port/win32security.c
+++ b/src/port/win32security.c
@@ -17,14 +17,14 @@
 #include "postgres_fe.h"
 #endif
 
+static void log_error(const char *fmt,...) pg_attribute_printf(1, 2);
+
 
 /*
  * Utility wrapper for frontend and backend when reporting an error
  * message.
  */
-static
-pg_attribute_printf(1, 2)
-void
+static void
 log_error(const char *fmt,...)
 {
 	va_list		ap;