diff --git a/xmlreader.c b/xmlreader.c
index e074da6a..142e51f2 100644
--- a/xmlreader.c
+++ b/xmlreader.c
@@ -58,7 +58,7 @@
   #ifdef __va_copy
     #define va_copy(dest, src) __va_copy(dest, src)
   #else
-    #define va_copy(dest, src) memcpy(dest, src, sizeof(va_list))
+    #define va_copy(dest, src) memcpy(&(dest), &(src), sizeof(va_list))
   #endif
 #endif
 
diff --git a/xmlstring.c b/xmlstring.c
index b5000e4f..5f03e07a 100644
--- a/xmlstring.c
+++ b/xmlstring.c
@@ -30,7 +30,7 @@
   #ifdef __va_copy
     #define va_copy(dest, src) __va_copy(dest, src)
   #else
-    #define va_copy(dest, src) memcpy(dest, src, sizeof(va_list))
+    #define va_copy(dest, src) memcpy(&(dest), &(src), sizeof(va_list))
   #endif
 #endif
 
diff --git a/xmlwriter.c b/xmlwriter.c
index b706889a..9a128e3d 100644
--- a/xmlwriter.c
+++ b/xmlwriter.c
@@ -36,7 +36,7 @@
   #ifdef __va_copy
     #define va_copy(dest, src) __va_copy(dest, src)
   #else
-    #define va_copy(dest, src) memcpy(dest, src, sizeof(va_list))
+    #define va_copy(dest, src) memcpy(&(dest), &(src), sizeof(va_list))
   #endif
 #endif