diff --git a/libc/src/string/memory_utils/bcmp_implementations.h b/libc/src/string/memory_utils/bcmp_implementations.h
index bfd52014325e5..4b676e4dccea5 100644
--- a/libc/src/string/memory_utils/bcmp_implementations.h
+++ b/libc/src/string/memory_utils/bcmp_implementations.h
@@ -23,6 +23,8 @@
 #elif defined(LIBC_TARGET_ARCH_IS_ANY_RISCV)
 #include "src/string/memory_utils/riscv/bcmp_implementations.h"
 #define LIBC_SRC_STRING_MEMORY_UTILS_BCMP inline_bcmp_riscv
+#elif defined(LIBC_TARGET_ARCH_IS_GPU)
+// TODO: Define a more optimal GPU impolementation.
 #else
 // We may want to error instead of defaulting to suboptimal implementation.
 #include "src/string/memory_utils/generic/byte_per_byte.h"
diff --git a/libc/src/string/memory_utils/memcmp_implementations.h b/libc/src/string/memory_utils/memcmp_implementations.h
index e18e64072732c..95889c560c0ff 100644
--- a/libc/src/string/memory_utils/memcmp_implementations.h
+++ b/libc/src/string/memory_utils/memcmp_implementations.h
@@ -24,6 +24,8 @@
 #elif defined(LIBC_TARGET_ARCH_IS_ANY_RISCV)
 #include "src/string/memory_utils/riscv/memcmp_implementations.h"
 #define LIBC_SRC_STRING_MEMORY_UTILS_MEMCMP inline_memcmp_riscv
+#elif defined(LIBC_TARGET_ARCH_IS_GPU)
+// TODO: Define a more optimal GPU impolementation.
 #else
 // We may want to error instead of defaulting to suboptimal implementation.
 #include "src/string/memory_utils/generic/byte_per_byte.h"
diff --git a/libc/src/string/memory_utils/memcpy_implementations.h b/libc/src/string/memory_utils/memcpy_implementations.h
index 657fbac3177ff..4e59230e2acb8 100644
--- a/libc/src/string/memory_utils/memcpy_implementations.h
+++ b/libc/src/string/memory_utils/memcpy_implementations.h
@@ -28,6 +28,8 @@
 #elif defined(LIBC_TARGET_ARCH_IS_ANY_RISCV)
 #include "src/string/memory_utils/riscv/memcpy_implementations.h"
 #define LIBC_SRC_STRING_MEMORY_UTILS_MEMCPY inline_memcpy_riscv
+#elif defined(LIBC_TARGET_ARCH_IS_GPU)
+// TODO: Define a more optimal GPU impolementation.
 #else
 // We may want to error instead of defaulting to suboptimal implementation.
 #include "src/string/memory_utils/generic/byte_per_byte.h"
diff --git a/libc/src/string/memory_utils/memmove_implementations.h b/libc/src/string/memory_utils/memmove_implementations.h
index 78ae7a88cc457..764ed66ab6dc7 100644
--- a/libc/src/string/memory_utils/memmove_implementations.h
+++ b/libc/src/string/memory_utils/memmove_implementations.h
@@ -20,6 +20,8 @@
 #elif defined(LIBC_TARGET_ARCH_IS_ANY_RISCV)
 #include "src/string/memory_utils/riscv/memmove_implementations.h"
 #define LIBC_SRC_STRING_MEMORY_UTILS_MEMMOVE inline_memmove_riscv
+#elif defined(LIBC_TARGET_ARCH_IS_GPU)
+// TODO: Define a more optimal GPU impolementation.
 #else
 // We may want to error instead of defaulting to suboptimal implementation.
 #include "src/string/memory_utils/generic/byte_per_byte.h"
diff --git a/libc/src/string/memory_utils/memset_implementations.h b/libc/src/string/memory_utils/memset_implementations.h
index 37ceff96fce9c..bb9317c927093 100644
--- a/libc/src/string/memory_utils/memset_implementations.h
+++ b/libc/src/string/memory_utils/memset_implementations.h
@@ -24,6 +24,8 @@
 #elif defined(LIBC_TARGET_ARCH_IS_ANY_RISCV)
 #include "src/string/memory_utils/riscv/memset_implementations.h"
 #define LIBC_SRC_STRING_MEMORY_UTILS_MEMSET inline_memset_riscv
+#elif defined(LIBC_TARGET_ARCH_IS_GPU)
+// TODO: Define a more optimal GPU impolementation.
 #else
 // We may want to error instead of defaulting to suboptimal implementation.
 #include "src/string/memory_utils/generic/byte_per_byte.h"