diff --git a/app/Makefile.am b/app/Makefile.am
index 1431c0060a..4e19ede147 100644
--- a/app/Makefile.am
+++ b/app/Makefile.am
@@ -73,6 +73,8 @@ libapp_sources = \
 libapp_generated_sources = \
 	git-version.h
 
+CLEANFILES = $(libapp_generated_sources)
+
 $(srcdir)/version.c: git-version.h
 
 libapp_a_SOURCES = $(libapp_sources) $(libapp_generated_sources)
diff --git a/app/tests/Makefile.am b/app/tests/Makefile.am
index a752872973..3be739fcef 100644
--- a/app/tests/Makefile.am
+++ b/app/tests/Makefile.am
@@ -20,6 +20,7 @@ TESTS = \
 
 
 EXTRA_PROGRAMS = $(TESTS)
+CLEANFILES = $(EXTRA_PROGRAMS)
 
 $(TESTS): gimpdir-output