diff --git a/src/funcs.c b/src/funcs.c
index d39056b7..33778ff1 100644
--- a/src/funcs.c
+++ b/src/funcs.c
@@ -27,29 +27,29 @@
 #include "file.h"
 
 #ifndef	lint
-FILE_RCSID("@(#)$File: funcs.c,v 1.90 2016/10/19 20:51:17 christos Exp $")
+FILE_RCSID("@(#)$File: funcs.c,v 1.92 2017/04/07 20:10:24 christos Exp $")
 #endif	/* lint */
 
 #include "magic.h"
 #include <assert.h>
 #include <stdarg.h>
 #include <stdlib.h>
 #include <string.h>
 #include <ctype.h>
 #if defined(HAVE_WCHAR_H)
 #include <wchar.h>
 #endif
 #if defined(HAVE_WCTYPE_H)
 #include <wctype.h>
 #endif
 #if defined(HAVE_LIMITS_H)
 #include <limits.h>
 #endif
 
 #ifndef SIZE_MAX
 #define SIZE_MAX	((size_t)~0)
 #endif
 
 /*
  * Like printf, only we append to a buffer.
  */
@@ -508,7 +508,9 @@ protected int
 file_regexec(file_regex_t *rx, const char *str, size_t nmatch,
     regmatch_t* pmatch, int eflags)
 {
 	assert(rx->rc == 0);
+	/* XXX: force initialization because glibc does not always do this */
+	memset(pmatch, 0, nmatch * sizeof(*pmatch));
 	return regexec(&rx->rx, str, nmatch, pmatch, eflags);
 }