diff --git a/src/Makefile.am b/src/Makefile.am
index e5f9213..f7f1cd5 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -2,7 +2,7 @@
 
 # Darwin support
 MACOSX_DEPLOYMENT_TARGET=@CONFIGURE_MACOSX_DEPLOYMENT_TARGET@
-export MACOSX_DEPLOYMENT_TARGET
+@EXPORT_MACOSX_DEPLOYMENT_TARGET@export MACOSX_DEPLOYMENT_TARGET
 
 # Set sub directories
 SUBDIRS = ctselect \
diff --git a/test/Makefile.am b/test/Makefile.am
index a7c1b1e..2470018 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -2,7 +2,7 @@
 
 # Darwin support
 MACOSX_DEPLOYMENT_TARGET=@CONFIGURE_MACOSX_DEPLOYMENT_TARGET@
-export MACOSX_DEPLOYMENT_TARGET
+@EXPORT_MACOSX_DEPLOYMENT_TARGET@export MACOSX_DEPLOYMENT_TARGET
 
 # Optional python bindings
 if WITH_PYTHON