undef ERROR if already defined
diff --git a/pattern.c b/pattern.c
index 8cd69ae..1570001 100644
--- a/pattern.c
+++ b/pattern.c
@@ -39,6 +39,9 @@
/* #define DEBUG_STREAMING */
+#ifdef ERROR
+#undef ERROR
+#endif
#define ERROR(a, b, c, d)
#define ERROR5(a, b, c, d, e)
diff --git a/xmlregexp.c b/xmlregexp.c
index aaff33e..8a8be98 100644
--- a/xmlregexp.c
+++ b/xmlregexp.c
@@ -44,6 +44,9 @@
#define MAX_PUSH 10000000
+#ifdef ERROR
+#undef ERROR
+#endif
#define ERROR(str) \
ctxt->error = XML_REGEXP_COMPILE_ERROR; \
xmlRegexpErrCompile(ctxt, str);