diff --git a/cuda/libucuda/Makefile b/cuda/libucuda/Makefile
index 312ee50..c62bec2 100644
--- a/cuda/libucuda/Makefile
+++ b/cuda/libucuda/Makefile
@@ -5,7 +5,7 @@ TARGET		= libucuda
 CUDUMP		= cudump
 GDEVDIR		= /usr/local/gdev
 CFLAGS          = -O3 -Wall -I $(GDEVDIR)/include
-LDFLAGS = -L $(GDEVDIR)/lib64 -lgdev -Wl,-Bsymbolic
+LDFLAGS = -L $(GDEVDIR)/lib64 -lgdev -lrt -Wl,-Bsymbolic
 
 #OBJS 	= $(patsubst %.c,%.o,$(wildcard ./*.c))
 OBJS 	= init.o device.o version.o context.o module.o execution.o memory.o stream.o ipc.o event.o gdev_cuda.o