diff --git a/GNUmakefile b/GNUmakefile
index bb90699..b4c7baa 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -86,9 +86,11 @@ ifneq ($(findstring gcc, $(CC)),)
 libobjc_CFLAGS += -fgnu89-inline 
 endif
 
-# Hack to get the __sync_* GCC builtins to work on Windows
 ifeq ($(GNUSTEP_TARGET_OS), mingw32)
+# Hack to get the __sync_* GCC builtins to work on Windows
 libobjc_CFLAGS += -march=i586
+# Hack to get mingw to provide declaration for strdup (since it is non-standard)
+libobjc_CPPFLAGS += -U__STRICT_ANSI__
 endif
 
 include $(GNUSTEP_MAKEFILES)/aggregate.make
diff --git a/toydispatch/GNUmakefile b/toydispatch/GNUmakefile
index 39af68e..331491a 100644
--- a/toydispatch/GNUmakefile
+++ b/toydispatch/GNUmakefile
@@ -15,9 +15,11 @@ toydispatch_LIBRARIES_DEPEND_UPON += -lpthread
 
 toydispatch_CFLAGS += -Werror -std=c99
 
-# Hack to get the __sync_* GCC builtins to work on Windows
 ifeq ($(GNUSTEP_TARGET_OS), mingw32)
+# Hack to get the __sync_* GCC builtins to work on Windows
 toydispatch_CFLAGS += -march=i586
+# Hack to get mingw to provide declaration for strdup (since it is non-standard)
+toydispatch_CPPFLAGS += -U__STRICT_ANSI__
 endif
 
 include $(GNUSTEP_MAKEFILES)/library.make