diff --git a/config.mk b/config.mk
index 3731589..8c32776 100644
--- a/config.mk
+++ b/config.mk
@@ -8,6 +8,10 @@ ifeq ($(OS),Linux)
 PREFIX = /usr
 MANPREFIX = $(PREFIX)/share/man
 endif
+ifeq ($(OS),FreeBSD)
+PREFIX = /usr/local
+MANPREFIX = $(PREFIX)/share/man
+endif
 ifeq ($(OS),OpenBSD)
 PREFIX = /usr/local
 MANPREFIX = $(PREFIX)/man
@@ -15,6 +19,10 @@ endif
 
 X11INC = /usr/X11R6/include
 X11LIB = /usr/X11R6/lib
+ifeq ($(OS),FreeBSD)
+X11INC = ${PREFIX}/include
+X11LIB = ${PREFIX}/lib
+endif
 
 # Xinerama, comment if you don't want it
 XINERAMALIBS  = -lXinerama
@@ -22,9 +30,7 @@ XINERAMAFLAGS = -DXINERAMA
 
 # freetype
 FREETYPELIBS = -lfontconfig -lXft
-ifeq ($(OS),Linux)
-FREETYPEINC = /usr/include/freetype2
-endif
+FREETYPEINC = ${PREFIX}/include/freetype2
 ifeq ($(OS),OpenBSD)
 FREETYPEINC = $(X11INC)/freetype2
 endif
diff --git a/dmenu.c b/dmenu.c
index 627f6cf..4a149f8 100644
--- a/dmenu.c
+++ b/dmenu.c
@@ -156,7 +156,7 @@ drawitem(struct item *item, int x, int y, int w)
 }
 
 static void
-recalculatenumbers()
+recalculatenumbers(void)
 {
 	unsigned int numer = 0, denom = 0;
 	struct item *item;