diff --git a/glib/gregex.c b/glib/gregex.c
index b7f0060d5..7da65694b 100644
--- a/glib/gregex.c
+++ b/glib/gregex.c
@@ -125,6 +125,30 @@
                             G_REGEX_MATCH_NEWLINE_CRLF  | \
                             G_REGEX_MATCH_NEWLINE_ANY)
 
+/* we rely on these flags having the same values */
+G_STATIC_ASSERT (G_REGEX_CASELESS        == PCRE_CASELESS);
+G_STATIC_ASSERT (G_REGEX_MULTILINE       == PCRE_MULTILINE);
+G_STATIC_ASSERT (G_REGEX_DOTALL          == PCRE_DOTALL);
+G_STATIC_ASSERT (G_REGEX_EXTENDED        == PCRE_EXTENDED);
+G_STATIC_ASSERT (G_REGEX_ANCHORED        == PCRE_ANCHORED);
+G_STATIC_ASSERT (G_REGEX_DOLLAR_ENDONLY  == PCRE_DOLLAR_ENDONLY);
+G_STATIC_ASSERT (G_REGEX_UNGREEDY        == PCRE_UNGREEDY);
+G_STATIC_ASSERT (G_REGEX_NO_AUTO_CAPTURE == PCRE_NO_AUTO_CAPTURE);
+G_STATIC_ASSERT (G_REGEX_DUPNAMES        == PCRE_DUPNAMES);
+G_STATIC_ASSERT (G_REGEX_NEWLINE_CR      == PCRE_NEWLINE_CR);
+G_STATIC_ASSERT (G_REGEX_NEWLINE_LF      == PCRE_NEWLINE_LF);
+G_STATIC_ASSERT (G_REGEX_NEWLINE_CRLF    == PCRE_NEWLINE_CRLF);
+
+G_STATIC_ASSERT (G_REGEX_MATCH_ANCHORED     == PCRE_ANCHORED);
+G_STATIC_ASSERT (G_REGEX_MATCH_NOTBOL       == PCRE_NOTBOL);
+G_STATIC_ASSERT (G_REGEX_MATCH_NOTEOL       == PCRE_NOTEOL);
+G_STATIC_ASSERT (G_REGEX_MATCH_NOTEMPTY     == PCRE_NOTEMPTY);
+G_STATIC_ASSERT (G_REGEX_MATCH_PARTIAL      == PCRE_PARTIAL);
+G_STATIC_ASSERT (G_REGEX_MATCH_NEWLINE_CR   == PCRE_NEWLINE_CR);
+G_STATIC_ASSERT (G_REGEX_MATCH_NEWLINE_LF   == PCRE_NEWLINE_LF);
+G_STATIC_ASSERT (G_REGEX_MATCH_NEWLINE_CRLF == PCRE_NEWLINE_CRLF);
+G_STATIC_ASSERT (G_REGEX_MATCH_NEWLINE_ANY  == PCRE_NEWLINE_ANY);
+
 /* if the string is in UTF-8 use g_utf8_ functions, else use
  * use just +/- 1. */
 #define NEXT_CHAR(re, s) (((re)->compile_opts & PCRE_UTF8) ? \