diff --git a/GSWAdaptors/common/GSWUtil.c b/GSWAdaptors/common/GSWUtil.c
index 72c5dee..49e1638 100644
--- a/GSWAdaptors/common/GSWUtil.c
+++ b/GSWAdaptors/common/GSWUtil.c
@@ -606,3 +606,25 @@ void FormatAPRTime(char *date_str, apr_time_t t)
 }
 
 #endif
+
+#ifndef __USE_GNU
+char* gsw_strndup(const char *s, size_t len)
+{
+  char *dups=NULL;
+
+  // search end of string
+  const char *end = memchr(s, '\0', len);
+  
+  if (end)
+     len=end-s;
+  
+  dups = malloc(len+1); // +1 for \0
+
+  if (len>0)
+        memcpy(dups,s,len);
+
+  dups[len]='\0';
+  return dups;
+}
+#endif
+
diff --git a/GSWAdaptors/common/GSWUtil.h b/GSWAdaptors/common/GSWUtil.h
index bdda47f..8cdabc3 100644
--- a/GSWAdaptors/common/GSWUtil.h
+++ b/GSWAdaptors/common/GSWUtil.h
@@ -128,6 +128,12 @@ void GSWLog_Init(GSWDict *p_pDict, int p_iLevel);
   void FormatAPRTime(char *date_str, apr_time_t t); // 2003/04/05 10:12:25.123
 #endif
 
+#ifdef __USE_GNU
+#define gsw_strndup(a,b) strndup((a),(b))
+#else
+  extern char* gsw_strndup(const char *s, size_t len);
+#endif
+
 #ifdef __cplusplus
 }
 #endif // __cplusplus