diff --git a/Makefile b/Makefile
index 0e49f0a..4460895 100644
--- a/Makefile
+++ b/Makefile
@@ -4,6 +4,7 @@ include $(CURDIR)/Makefile.cfg
 
 # DEDUCED VARS
 ALLOBJ = $(SRC:%=$(OBJDIR)/%.o)
+ALLINC = $(INC:%=$(INCDIR)/%.h)
 
 # RULES
 ## Make it all (default rule)
@@ -18,7 +19,7 @@ $(OBJDIR)/%.o: $(SRCDIR)/%.s
 	$(AS) -c -o $@ $<
 
 ## Make an object file out of a C source file
-$(OBJDIR)/%.o: $(SRCDIR)/%.c
+$(OBJDIR)/%.o: $(SRCDIR)/%.c $(ALLINC)
 	$(CC) -c -o $@ $< $(CFLAGS)
 
 ## Make the ELF file
diff --git a/Makefile.cfg b/Makefile.cfg
index ccbff85..34eeb42 100644
--- a/Makefile.cfg
+++ b/Makefile.cfg
@@ -35,7 +35,8 @@ SENDR = UsbConnector
 SRC = crt0 Sound4Calc syscall
 
 # INCLUDES
-INC = dispbios endian filebios fxlib keybios syscall timer \
+INC = dispbios endian filebios fxlib keybios timer \
+      stdlib syscall \
       Sound4Calc
 
 # END OF FILE