diff --git a/libs/surfaceflinger/Android.mk b/libs/surfaceflinger/Android.mk
index 93cb5ae..88e76dc 100644
--- a/libs/surfaceflinger/Android.mk
+++ b/libs/surfaceflinger/Android.mk
@@ -28,7 +28,7 @@
 # need "-lrt" on Linux simulator to pick up clock_gettime
 ifeq ($(TARGET_SIMULATOR),true)
 	ifeq ($(HOST_OS),linux)
-		LOCAL_LDLIBS += -lrt
+		LOCAL_LDLIBS += -lrt -lpthread
 	endif
 endif
 
diff --git a/media/libmedia/Android.mk b/media/libmedia/Android.mk
index 806ef52..ebbf13f 100644
--- a/media/libmedia/Android.mk
+++ b/media/libmedia/Android.mk
@@ -26,7 +26,7 @@
 LOCAL_MODULE:= libmedia
 
 ifeq ($(TARGET_OS)-$(TARGET_SIMULATOR),linux-true)
-LOCAL_LDLIBS += -ldl
+LOCAL_LDLIBS += -ldl -lpthread
 endif
 
 ifneq ($(TARGET_SIMULATOR),true)