diff --git a/src/Makefile b/src/Makefile
index 5b4b6d3..a0a2c00 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -6,6 +6,7 @@ LIBOBJS=$(LIBSRCS:.cpp=.o)
 INCLUDE=../include
 
 CFLAGS=-larmadillo -llapack -std=c++11
+OPENMP=-fopenmp
 
 # Add a debug flag when compiling (For the DEBUG macro in utils.hpp)
 DEBUG ?= 0
@@ -22,14 +23,14 @@ all: test_suite main
 
 # Rules for executables
 main: main.o $(LIBOBJS)
-	$(CC) $^ -o $@ $(CFLAGS) $(DBGFLAG) -I$(INCLUDE)
+	$(CC) $^ -o $@ $(CFLAGS) $(DBGFLAG) -I$(INCLUDE) $(OPENMP)
 
 test_suite: test_suite.o $(LIBOBJS)
-	$(CC) $^ -o $@ $(CFLAGS) $(DBGFLAG) -I$(INCLUDE)
+	$(CC) $^ -o $@ $(CFLAGS) $(DBGFLAG) -I$(INCLUDE) $(OPENMP)
 
 # Rule for object files
 %.o: %.cpp
-	$(CC) -c $^ -o $@ $(DBGFLAG) -I$(INCLUDE)
+	$(CC) -c $^ -o $@ $(DBGFLAG) -I$(INCLUDE) $(OPENMP)
 
 # Make documentation
 doxygen: