diff --git a/src/Makefile.am b/src/Makefile.am
index 4e7cea1..e23ab10 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -25,8 +25,16 @@
 	libmsc \
 	$(NULL)
 
+if BUILD_SMPP
+
+SUBDIRS += \
+	libsmpputil \
+	utils \
+	$(NULL)
+
+endif
+
 # Programs
 SUBDIRS += \
 	osmo-msc \
-	utils \
 	$(NULL)