diff --git a/toolchains/devkit3ds/packages/Project_CTR/patches/00_fix_missing_strdup.patch b/toolchains/devkit3ds/packages/Project_CTR/patches/00_fix_missing_strdup.patch
new file mode 100644
index 0000000..8953f2f
--- /dev/null
+++ b/toolchains/devkit3ds/packages/Project_CTR/patches/00_fix_missing_strdup.patch
@@ -0,0 +1,13 @@
+diff --git a/makerom/deps/libyaml/makefile b/makerom/deps/libyaml/makefile
+index 785e3b8..a6dfba7 100644
+--- a/makerom/deps/libyaml/makefile
++++ b/makerom/deps/libyaml/makefile
+@@ -86,7 +86,7 @@ else ifeq ($(PROJECT_PLATFORM), GNU)
+ 	#CXX =
+ 	WARNFLAGS = -Wall -Wno-unused-value -Wno-unused-but-set-variable
+ 	ARCHFLAGS =
+-	INC +=
++	INC += -D_GNU_SOURCE
+ 	LIB +=
+ 	ARFLAGS = cr -o
+ else ifeq ($(PROJECT_PLATFORM), MACOS)