diff --git a/src/vsnprintf.c b/src/vsnprintf.c
index 94485c5f5..4248d726b 100644
--- a/src/vsnprintf.c
+++ b/src/vsnprintf.c
@@ -1,5 +1,5 @@
 /*
- * "$Id: vsnprintf.c,v 1.1 1998/11/05 16:07:45 mike Exp $"
+ * "$Id: vsnprintf.c,v 1.2 1998/11/05 21:25:37 mike Exp $"
  *
  * vsnprintf() function for the Fast Light Tool Kit (FLTK).
  *
@@ -43,6 +43,9 @@
 
 #if !HAVE_VSNPRINTF
 
+#  ifdef __cplusplus
+extern "C"
+#  endif 
 int vsnprintf(char* str, size_t size, const char* fmt, va_list ap) {
   const char* e = str+size-1;
   char* p = str;
@@ -111,6 +114,9 @@ int vsnprintf(char* str, size_t size, const char* fmt, va_list ap) {
 
 #if !HAVE_SNPRINTF
 
+#  ifdef __cplusplus
+extern "C"
+#  endif 
 int snprintf(char* str, size_t size, const char* fmt, ...) {
   int ret;
   va_list ap;
@@ -123,5 +129,5 @@ int snprintf(char* str, size_t size, const char* fmt, ...) {
 #endif
 
 /*
- * End of "$Id: vsnprintf.c,v 1.1 1998/11/05 16:07:45 mike Exp $".
+ * End of "$Id: vsnprintf.c,v 1.2 1998/11/05 21:25:37 mike Exp $".
  */