diff --git a/Makefile.sum b/Makefile.sum
index feeb2f3..c9d8f58 100644
--- a/Makefile.sum
+++ b/Makefile.sum
@@ -17,7 +17,7 @@ FC=gfortran
 FFLAGS=-O3
 #FFLAGS=-Wall -g -finit-real=nan -ffpe-trap=invalid -fcheck=all -fbounds-check
 
-DIRECTIVES = -DREVISION="178M"
+DIRECTIVES = -DREVISION="'$(shell svnversion src)'"
 
 all: $(EXE)
 
@@ -65,7 +65,7 @@ utils.o: const_and_precisions.o
 .PHONY: clean install
 # Remove output files
 clean:
-	rm -rf *.o *.mod
+	rm -rf *.o *.mod $(EXE)
 
 install:
 	@if [ -f $(EXE) ]; then \