diff --git a/dmenu.1 b/dmenu.1
index 757c5d8..ef62af4 100644
--- a/dmenu.1
+++ b/dmenu.1
@@ -3,7 +3,7 @@
 dmenu \- dynamic menu
 .SH SYNOPSIS
 .B dmenu
-.RB [ \-bFfiv ]
+.RB [ \-bFfsv ]
 .RB [ \-l
 .IR lines ]
 .RB [ \-m
@@ -58,8 +58,8 @@ disables fuzzy matching.
 dmenu grabs the keyboard before reading stdin if not reading from a tty. This
 is faster, but will lock up X until stdin reaches end\-of\-file.
 .TP
-.B \-i
-dmenu matches menu items case insensitively.
+.B \-s
+dmenu matches menu items case sensitively.
 .TP
 .BI \-l " lines"
 dmenu lists items vertically, with the given number of lines.
diff --git a/dmenu.c b/dmenu.c
index aae0780..cca39fd 100644
--- a/dmenu.c
+++ b/dmenu.c
@@ -58,8 +58,9 @@ static Clr *scheme[SchemeLast];
 
 #include "config.h"
 
-static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
-static char *(*fstrstr)(const char *, const char *) = strstr;
+static char * cistrstr(const char *s, const char *sub);
+static int (*fstrncmp)(const char *, const char *, size_t) = strncasecmp;
+static char *(*fstrstr)(const char *, const char *) = cistrstr;
 
 static unsigned int
 textw_clamp(const char *str, unsigned int n)
@@ -890,9 +891,9 @@ main(int argc, char *argv[])
 			fast = 1;
 		else if (!strcmp(argv[i], "-c"))   /* centers dmenu on screen */
 			centered = 1;
-		else if (!strcmp(argv[i], "-i")) { /* case-insensitive item matching */
-			fstrncmp = strncasecmp;
-			fstrstr = cistrstr;
+		else if (!strcmp(argv[i], "-s")) { /* case sensitivity */
+			fstrncmp = strncmp;
+			fstrstr = strstr;
 		} else if (i + 1 == argc)
 			usage();
 		/* these options take one argument */