diff --git a/src/osd/sdl/sdl.mak b/src/osd/sdl/sdl.mak
index 432c8a4c6e9..df7a8913ecc 100644
--- a/src/osd/sdl/sdl.mak
+++ b/src/osd/sdl/sdl.mak
@@ -548,7 +548,7 @@ endif
 
 # libs that Haiku doesn't want but are mandatory on *IX
 ifneq ($(TARGETOS),haiku)
-LIBS += -lm -lutil
+LIBS += -lm -lutil -lpthread
 endif
 
 endif # not Mac OS X