diff --git a/mail-filter/exim-p0f/exim-p0f-0.1.ebuild b/mail-filter/exim-p0f/exim-p0f-0.1-r1.ebuild
similarity index 91%
rename from mail-filter/exim-p0f/exim-p0f-0.1.ebuild
rename to mail-filter/exim-p0f/exim-p0f-0.1-r1.ebuild
index 885ec0c746478..0a43992071657 100644
--- a/mail-filter/exim-p0f/exim-p0f-0.1.ebuild
+++ b/mail-filter/exim-p0f/exim-p0f-0.1-r1.ebuild
@@ -19,7 +19,7 @@ RDEPEND=">=net-analyzer/p0f-3.05_beta
 S="${WORKDIR}/exim-p0f3-dlfunc-${PV}"
 
 src_configure() {
-	append-cppflags "-I/usr/include/exim"
+	append-cppflags "-I/usr/include/exim -DDLFUNC_IMPL"
 	econf
 }