diff --git a/Application.mk b/Application.mk
index 7f5936da8..b3b4d11b8 100644
--- a/Application.mk
+++ b/Application.mk
@@ -96,7 +96,7 @@ endif
 ifneq ($(strip $(PROGNAME)),)
   PROGOBJ := $(MAINCOBJ) $(MAINCXXOBJ) $(MAINRUSTOBJ)
   ifneq ($(words $(PROGOBJ)), $(words $(PROGNAME)))
-    $(warning "program names $(PROGNAME) does not match mainsrcs $(PROGOBJ)")
+    $(error "program names $(PROGNAME) does not match mainsrcs $(PROGOBJ)")
   endif
   PROGLIST := $(addprefix $(BINDIR)$(DELIM),$(PROGNAME))
   REGLIST := $(addprefix $(BUILTIN_REGISTRY)$(DELIM),$(addsuffix .bdat,$(PROGNAME)))