diff --git a/src/project.conf b/src/project.conf
index d4f5f28..bca9149 100644
--- a/src/project.conf
+++ b/src/project.conf
@@ -18,6 +18,7 @@ type=binary
 #XXX may be statically linked to libMailer (if built before libMailer.so)
 depends=$(OBJDIR)libMailer$(SOEXT)
 sources=compose-main.c
+cflags=-fPIE
 ldflags=`pkg-config --libs openssl` -lssl -L$(OBJDIR). -Wl,-rpath,$(LIBDIR) -lMailer -Wl,-pie
 install=$(BINDIR)
 
@@ -26,6 +27,7 @@ type=binary
 #XXX may be statically linked to libMailer (if built before libMailer.so)
 depends=$(OBJDIR)libMailer$(SOEXT)
 sources=main.c
+cflags=-fPIE
 install=$(BINDIR)
 ldflags=`pkg-config --libs openssl` -lssl -L$(OBJDIR). -Wl,-rpath,$(LIBDIR) -lMailer -Wl,-pie