src/Makefile.am: Fix compilation of the riemann.proto file.

diff --git a/src/Makefile.am b/src/Makefile.am
index 98c62fa..799725a 100644 (file)
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1429,7 +1429,7 @@ pinba.pb-c.c pinba.pb-c.h: pinba.proto
        protoc-c -I$(srcdir) --c_out . $(srcdir)/pinba.proto
 
 riemann.pb-c.c riemann.pb-c.h: riemann.proto
-       protoc-c --c_out . riemann.proto
+       protoc-c -I$(srcdir) --c_out . $(srcdir)/riemann.proto
 
 install-exec-hook:
        $(mkinstalldirs) $(DESTDIR)$(sysconfdir)