diff --git a/Quake/Makefile b/Quake/Makefile
index 3f9a7c6..2b09be9 100644
--- a/Quake/Makefile
+++ b/Quake/Makefile
@@ -193,7 +193,7 @@ DEFAULT_TARGET := quakespasm
 # ---------------------------
 
 %.o:	%.c
-	$(CC) $(DFLAGS) -c $(CFLAGS) $(SDL_CFLAGS) -o $@ $^
+	$(CC) $(DFLAGS) -c $(CFLAGS) $(SDL_CFLAGS) -o $@ $<
 
 # ----------------------------------------------------------------------------
 # objects
@@ -290,6 +290,8 @@ quakespasm:	$(OBJS)
 	$(LINKER) $(OBJS) $(LDFLAGS) $(LIBS) $(SDL_LIBS) -o $@
 	$(call do_strip,$@)
 
+image.o: lodepng.c lodepng.h stb_image_write.h
+
 release:	quakespasm
 debug:
 	$(error Use "make DEBUG=1")
diff --git a/Quake/Makefile.darwin b/Quake/Makefile.darwin
index d6068aa..b2afdbb 100644
--- a/Quake/Makefile.darwin
+++ b/Quake/Makefile.darwin
@@ -215,11 +215,11 @@ DEFAULT_TARGET := quakespasm
 # ---------------------------
 
 %.o:	%.c
-	$(CC) $(DFLAGS) -c $(CFLAGS) $(SDL_CFLAGS) -o $@ $^
+	$(CC) $(DFLAGS) -c $(CFLAGS) $(SDL_CFLAGS) -o $@ $<
 %.o:	%.m
-	$(CC) $(DFLAGS) -c $(CFLAGS) $(SDL_CFLAGS) -o $@ $^
+	$(CC) $(DFLAGS) -c $(CFLAGS) $(SDL_CFLAGS) -o $@ $<
 %.o:	../MacOSX/%.m
-	$(CC) $(DFLAGS) -c -I../MacOSX $(CFLAGS) $(SDL_CFLAGS) -o $@ $^
+	$(CC) $(DFLAGS) -c -I../MacOSX $(CFLAGS) $(SDL_CFLAGS) -o $@ $<
 
 # ----------------------------------------------------------------------------
 # objects
@@ -316,6 +316,8 @@ quakespasm:	$(OBJS)
 	$(LINKER) $(OBJS) $(LDFLAGS) $(LIBS) $(SDL_LIBS) -o $@
 	$(call do_strip,$@)
 
+image.o: lodepng.c lodepng.h stb_image_write.h
+
 release:	quakespasm
 debug:
 	$(error Use "make DEBUG=1")
diff --git a/Quake/Makefile.w32 b/Quake/Makefile.w32
index c359806..7ec7b89 100644
--- a/Quake/Makefile.w32
+++ b/Quake/Makefile.w32
@@ -181,9 +181,9 @@ DEFAULT_TARGET := quakespasm.exe
 # ---------------------------
 
 %.o:	%.c
-	$(CC) $(DFLAGS) -c $(CFLAGS) $(SDL_CFLAGS) -o $@ $^
+	$(CC) $(DFLAGS) -c $(CFLAGS) $(SDL_CFLAGS) -o $@ $<
 %.res:	../Windows/%.rc
-	$(WINDRES) -I../Windows --output-format=coff --target=pe-i386 -o $@ $^
+	$(WINDRES) -I../Windows --output-format=coff --target=pe-i386 -o $@ $<
 
 # ----------------------------------------------------------------------------
 # objects
@@ -280,6 +280,8 @@ quakespasm.exe:	$(OBJS)
 	$(LINKER) $(OBJS) $(LDFLAGS) $(LIBS) $(SDL_LIBS) -o $@
 	$(call do_strip,$@)
 
+image.o: lodepng.c lodepng.h stb_image_write.h
+
 release:	quakespasm.exe
 debug:
 	$(error Use "make DEBUG=1")
diff --git a/Quake/Makefile.w64 b/Quake/Makefile.w64
index 8112c2a..6b56878 100644
--- a/Quake/Makefile.w64
+++ b/Quake/Makefile.w64
@@ -179,9 +179,9 @@ DEFAULT_TARGET := quakespasm.exe
 # ---------------------------
 
 %.o:	%.c
-	$(CC) $(DFLAGS) -c $(CFLAGS) $(SDL_CFLAGS) -o $@ $^
+	$(CC) $(DFLAGS) -c $(CFLAGS) $(SDL_CFLAGS) -o $@ $<
 %.res:	../Windows/%.rc
-	$(WINDRES) -I../Windows --output-format=coff --target=pe-x86-64 -o $@ $^
+	$(WINDRES) -I../Windows --output-format=coff --target=pe-x86-64 -o $@ $<
 
 # ----------------------------------------------------------------------------
 # objects
@@ -278,6 +278,8 @@ quakespasm.exe:	$(OBJS)
 	$(LINKER) $(OBJS) $(LDFLAGS) $(LIBS) $(SDL_LIBS) -o $@
 	$(call do_strip,$@)
 
+image.o: lodepng.c lodepng.h stb_image_write.h
+
 release:	quakespasm.exe
 debug:
 	$(error Use "make DEBUG=1")