diff --git a/Makefile b/Makefile
index d31cf5b..f3e3893 100644
--- a/Makefile
+++ b/Makefile
@@ -21,7 +21,17 @@ LDFLAGS= -static-libgfortran -static-libgcc
 LIBS= /usr/local/lib/libquadmath.a
 # FFLAGS=-Wall -g -finit-real=nan -ffpe-trap=invalid -fcheck=all -fbounds-check
 
-DIRECTIVES = -DREVISION="'$(shell svnversion src)'"
+##
+## Git information (used in the version string)
+##
+
+# Short hash of the latest commit
+GIT_REV   ?= $(shell git rev-parse --short HEAD)
+
+# Whether the worktree and the latest commit differs
+GIT_DIRTY ?= $(shell test -n "$$(git status --porcelain)" && echo "-dirty")
+
+DIRECTIVES = -DREVISION=\"$(GIT_REV)$(GIT_DIRTY)\" -DPREFIX=\"$(PREFIX)\"
 
 all: $(EXE)