diff --git a/automation/Makefile b/automation/Makefile
index d5425b730..5483dbded 100644
--- a/automation/Makefile
+++ b/automation/Makefile
@@ -14,7 +14,7 @@ $(DESTDIR)$(P_DATA)/automation/%: $(d)%
 
 aegisub-lua_OBJ := $(d)tests/aegisub.o $(TOP)lib/libaegisub.a $(TOP)lib/libluabins.a $(LIBS_LUA)
 aegisub-lua_CPPFLAGS := $(CPPFLAGS_BOOST) $(CFLAGS_LUA) -I$(TOP)libaegisub/include -I$(TOP)src $(CXXFLAGS_WX)
-aegisub-lua_LIBS := $(LIBS_WX) $(LIBS_BOOST) $(LIBS_ICU)
+aegisub-lua_LIBS := $(LIBS_WX) $(LIBS_BOOST) $(LIBS_ICU) $(LIBS_PTHREAD)
 
 PROGRAM += $(d)aegisub-lua
 
diff --git a/libaegisub/Makefile b/libaegisub/Makefile
index b02152345..d5901da96 100644
--- a/libaegisub/Makefile
+++ b/libaegisub/Makefile
@@ -44,7 +44,7 @@ aegisub_OBJ += $(d)common/dispatch.o
 endif
 
 aegisub_PCH := $(d)lagi_pre.h
-aegisub_CPPFLAGS := -I$(d)include -I$(TOP) $(CPPFLAGS_BOOST) $(CFLAGS_LUA)
+aegisub_CPPFLAGS := -I$(d)include -I$(TOP) $(CPPFLAGS_BOOST) $(CFLAGS_LUA) $(CFLAGS_PTHREAD)
 
 $(d)common/charset.o_FLAGS := $(CFLAGS_UCHARDET)
 $(d)common/charset_conv.o_FLAGS := $(CFLAGS_ICONV)
diff --git a/tests/Makefile b/tests/Makefile
index e75b9c03a..8c30c1d5b 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -7,7 +7,7 @@ run_PCH := $(d)support/tests_pre.h
 run_CPPFLAGS := -I$(TOP)libaegisub/include -I$(TOP) -I$(d)support \
 	-I$(GTEST_ROOT) -I$(GTEST_ROOT)/include $(CPPFLAGS_BOOST) $(CFLAGS_LUA)
 run_CXXFLAGS := -Wno-unused-value -Wno-sign-compare
-run_LIBS := $(LIBS_BOOST) $(LIBS_ICU) -pthread $(LIBS_UCHARDET)
+run_LIBS := $(LIBS_BOOST) $(LIBS_ICU) $(LIBS_UCHARDET) $(LIBS_PTHREAD)
 run_OBJ := \
 	$(subst .cpp,.o,$(wildcard $(d)tests/*.cpp)) \
 	$(d)support/main.o \
diff --git a/tools/Makefile b/tools/Makefile
index a35049e48..de6166a1e 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -7,7 +7,7 @@ PROGRAM += $(d)osx-bundle-restart-helper
 endif
 
 repack-thes-dict_OBJ  := $(d)repack-thes-dict.o $(TOP)lib/libaegisub.a
-repack-thes-dict_LIBS := $(LIBS_BOOST) $(LIBS_ICU) $(PTHREAD_LIBS)
+repack-thes-dict_LIBS := $(LIBS_BOOST) $(LIBS_ICU) $(LIBS_PTHREAD)
 repack-thes-dict_CPPFLAGS := -I$(TOP) -I$(TOP)libaegisub/include $(CFLAGS_ICU)
 
 PROGRAM += $(d)repack-thes-dict