diff --git a/format.c b/format.c
index a0c654fb..24836b0b 100644
--- a/format.c
+++ b/format.c
@@ -21,6 +21,7 @@
 
 #include <ctype.h>
 #include <errno.h>
+#include <fnmatch.h>
 #include <libgen.h>
 #include <netdb.h>
 #include <stdarg.h>
@@ -868,6 +869,12 @@ format_replace(struct format_tree *ft, const char *key, size_t keylen,
 
 	/* Is there a length limit or whatnot? */
 	switch (copy[0]) {
+	case 'm':
+		if (copy[1] != ':')
+			break;
+		compare = -2;
+		copy += 2;
+		break;
 	case '!':
 		if (copy[1] == '=' && copy[2] == ':') {
 			compare = -1;
@@ -943,6 +950,8 @@ format_replace(struct format_tree *ft, const char *key, size_t keylen,
 			value = xstrdup("1");
 		else if (compare == -1 && strcmp(left, right) != 0)
 			value = xstrdup("1");
+		else if (compare == -2 && fnmatch(left, right, 0) == 0)
+			value = xstrdup("1");
 		else
 			value = xstrdup("0");
 		free(right);
diff --git a/tmux.1 b/tmux.1
index 41f6057c..1ba66da4 100644
--- a/tmux.1
+++ b/tmux.1
@@ -3444,6 +3444,13 @@ if running on
 .Ql myhost ,
 otherwise by
 .Ql 0.
+An
+.Ql m
+specifies a
+.Xr fnmatch 3
+comparison - the first argument is the pattern and the second the string to
+compare. For example,
+.Ql #{m:*foo*,#{host}} .
 .Pp
 A limit may be placed on the length of the resultant string by prefixing it
 by an