diff --git a/bindings/ruby/rbsigar.c b/bindings/ruby/rbsigar.c
index adfddb1c..4464ec71 100644
--- a/bindings/ruby/rbsigar.c
+++ b/bindings/ruby/rbsigar.c
@@ -17,6 +17,7 @@
  */
 
 #include <ruby.h>
+#include <version.h>
 #include <regex.h>
 #include <errno.h>
 #include "sigar.h"
@@ -36,6 +37,12 @@
 #define RSTRING_LEN(s) RSTRING(s)->len
 #endif
 
+#if (RUBY_VERSION_MAJOR >= 1) && ((RUBY_VERSION_MINOR == 8) && (RUBY_VERSION_TEENY >= 6))
+#  define RB_REGEX_ERROR rb_eRegexpError
+#else
+#  define RB_REGEX_ERROR rb_eArgError
+#endif
+
 static sigar_t *rb_sigar_get(VALUE obj)
 {
     sigar_t *sigar;
@@ -56,7 +63,7 @@ static int rbsigar_ptql_re_impl(void *data,
     /* XXX cache */
     if ((err = re_compile_pattern(needle, strlen(needle), regex))) {
         re_free_pattern(regex);
-        rb_raise(rb_eRegexpError, "%s", err);
+        rb_raise(RB_REGEX_ERROR, "%s", err);
         return 0;
     }