diff --git a/Makefile b/Makefile
index e6751ab..e34e130 100644
--- a/Makefile
+++ b/Makefile
@@ -10,7 +10,11 @@ MKDIR	= mkdir -m 0755 -p
 all: subdirs
 
 subdirs:
-	@for i in $(SUBDIRS); do (cd "$$i" && $(MAKE)) || exit; done
+	@for i in $(SUBDIRS); do (cd "$$i" && \
+		if [ -n "$(OBJDIR)" ]; then \
+		([ -d "$(OBJDIR)$$i" ] || $(MKDIR) -- "$(OBJDIR)$$i") && \
+		$(MAKE) OBJDIR="$(OBJDIR)$$i/"; \
+		else $(MAKE); fi) || exit; done
 
 clean:
 	@for i in $(SUBDIRS); do (cd "$$i" && $(MAKE) clean) || exit; done
diff --git a/include/Makefile b/include/Makefile
index 428dcc3..e99adb4 100644
--- a/include/Makefile
+++ b/include/Makefile
@@ -12,7 +12,11 @@ INCLUDEDIR= $(PREFIX)/include
 all: subdirs
 
 subdirs:
-	@for i in $(SUBDIRS); do (cd "$$i" && $(MAKE)) || exit; done
+	@for i in $(SUBDIRS); do (cd "$$i" && \
+		if [ -n "$(OBJDIR)" ]; then \
+		([ -d "$(OBJDIR)$$i" ] || $(MKDIR) -- "$(OBJDIR)$$i") && \
+		$(MAKE) OBJDIR="$(OBJDIR)$$i/"; \
+		else $(MAKE); fi) || exit; done
 
 clean:
 	@for i in $(SUBDIRS); do (cd "$$i" && $(MAKE) clean) || exit; done
diff --git a/src/Makefile b/src/Makefile
index ebeb5c4..c635004 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -20,7 +20,11 @@ INSTALL	= install
 all: subdirs $(TARGETS)
 
 subdirs:
-	@for i in $(SUBDIRS); do (cd "$$i" && $(MAKE)) || exit; done
+	@for i in $(SUBDIRS); do (cd "$$i" && \
+		if [ -n "$(OBJDIR)" ]; then \
+		([ -d "$(OBJDIR)$$i" ] || $(MKDIR) -- "$(OBJDIR)$$i") && \
+		$(MAKE) OBJDIR="$(OBJDIR)$$i/"; \
+		else $(MAKE); fi) || exit; done
 
 presenter_OBJS = $(OBJDIR)document.o $(OBJDIR)presenter.o $(OBJDIR)slide.o $(OBJDIR)main.o
 presenter_CFLAGS = $(CPPFLAGSF) $(CPPFLAGS) $(CFLAGSF) $(CFLAGS)