diff --git a/src/Makefile b/src/Makefile
index 2dda583b75823cf7477ff94e80a9a7e0525b87cc..6e651a19358344edbc882d41809137a6ed06298a 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -27,7 +27,7 @@ MODEL_SRC_BENCH = benchmod.c
 
 # On Linux Cluster using OpenMPI
  CC=mpicc
- LFLAGS=
+ LFLAGS=-lm
  CFLAGS=-Wall -O3
 
 # On InstitutsCluster2 using intelMPI AND ITAC (no optimization)