1 files changed, 1 insertions, 1 deletions

diff --git a/src/scalarproduct/Makefile.am b/src/scalarproduct/Makefile.am
index 010d7ebfa..0f838a7f9 100644
--- a/src/scalarproduct/Makefile.am
+++ b/src/scalarproduct/Makefile.am
@@ -67,6 +67,6 @@ check_SCRIPTS = \
   test_scalarproduct_negativezero.sh
 
 if ENABLE_TEST_RUN
-  TESTS_ENVIRONMENT=export GNUNET_PREFIX=@libdir@;export PATH=@prefix@/bin:$$PATH;
+  AM_TESTS_ENVIRONMENT=export GNUNET_PREFIX=$${GNUNET_PREFIX:-@libdir@};export PATH=$${GNUNET_PREFIX:-@prefix@}/bin:$$PATH;
   TESTS = $(check_SCRIPTS)
 endif