diff --git a/src/Makefile b/src/Makefile
index 60baeb5..6705ac3 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -1,4 +1,4 @@
-EXEC=ecoPCR ecofind ecoisundertaxon
+EXEC=ecoPCR ecofind ecogrep
 
 PCR_SRC= ecopcr.c
 PCR_OBJ= $(patsubst %.c,%.o,$(PCR_SRC))
@@ -6,6 +6,9 @@ PCR_OBJ= $(patsubst %.c,%.o,$(PCR_SRC))
 FIND_SRC= ecofind.c
 FIND_OBJ= $(patsubst %.c,%.o,$(FIND_SRC))
 
+GREP_SRC= ecogrep.c
+GREP_OBJ= $(patsubst %.c,%.o,$(GREP_SRC))
+
 IUT_SRC= ecoisundertaxon.c
 IUT_OBJ= $(patsubst %.c,%.o,$(IUT_SRC))
 
@@ -44,6 +47,17 @@ ecoPCR: $(PCR_OBJ) $(LIBFILE)
 ecofind: $(FIND_OBJ) $(LIBFILE)
 	$(CC) $(LDFLAGS) -o $@ $< $(LIBPATH) $(LIB)
 	
+########
+#
+# ecogrep compilation
+#
+########
+	
+# executable compilation and link
+
+ecogrep: $(GREP_OBJ) $(LIBFILE)
+	$(CC) $(LDFLAGS) -o $@ $< $(LIBPATH) $(LIB)
+	
 ########
 #
 # IsUnderTaxon compilation