diff --git a/srcpkgs/chromium/patches/fix-dawn-platform.patch b/srcpkgs/chromium/patches/fix-dawn-platform.patch
new file mode 100644
index 00000000000..93631294fc7
--- /dev/null
+++ b/srcpkgs/chromium/patches/fix-dawn-platform.patch
@@ -0,0 +1,62 @@
+From f815e833c946a59620a2ca9df37a1da746f61460 Mon Sep 17 00:00:00 2001
+From: q66 <daniel@octaforge.org>
+Date: Sat, 1 Oct 2022 00:21:09 +0000
+Subject: [PATCH] fix dawn build for ppc64
+
+---
+ third_party/dawn/src/dawn/common/Assert.cpp |  4 ++--
+ third_party/dawn/src/dawn/common/Platform.h | 10 +++++-----
+ 2 files changed, 7 insertions(+), 7 deletions(-)
+
+diff --git a/third_party/dawn/src/dawn/common/Assert.cpp b/third_party/dawn/src/dawn/common/Assert.cpp
+index ecc92dfc..8ee91a90 100644
+--- a/third_party/dawn/src/dawn/common/Assert.cpp
++++ b/third_party/dawn/src/dawn/common/Assert.cpp
+@@ -31,9 +31,9 @@ void BreakPoint() {
+     __asm__ __volatile__("ebreak");
+ #elif DAWN_PLATFORM_IS(MIPS)
+     __asm__ __volatile__("break");
+-#elif DAWN_PLATFORM_IS(S390) || DAWN_PLATFORM_IS_(S390X)
++#elif DAWN_PLATFORM_IS(S390) || DAWN_PLATFORM_IS(S390X)
+     __asm__ __volatile__(".word 0x0001");
+-#elif DAWN_PLATFORM_IS(PPC) || DAWN_PLATFORM_IS_(PPC64)
++#elif DAWN_PLATFORM_IS(PPC) || DAWN_PLATFORM_IS(PPC64)
+     __asm__ __volatile__("twge 2,2");
+ #else
+ #error "Unsupported platform"
+diff --git a/third_party/dawn/src/dawn/common/Platform.h b/third_party/dawn/src/dawn/common/Platform.h
+index 39d5eb41..2011367d 100644
+--- a/third_party/dawn/src/dawn/common/Platform.h
++++ b/third_party/dawn/src/dawn/common/Platform.h
+@@ -124,15 +124,15 @@
+ #define DAWN_PLATFORM_IS_MIPS64 1
+ #endif
+ 
+-#elif defiend(__s390__)
++#elif defined(__s390__)
+ #define DAWN_PLATFORM_IS_S390 1
+-#elif defiend(__s390x__)
++#elif defined(__s390x__)
+ #define DAWN_PLATFORM_IS_S390X 1
+ 
+-#elif defined(__PPC__)
+-#define DAWN_PLATFORM_IS_PPC 1
+ #elif defined(__PPC64__)
+ #define DAWN_PLATFORM_IS_PPC64 1
++#elif defined(__PPC__)
++#define DAWN_PLATFORM_IS_PPC 1
+ 
+ #else
+ #error "Unsupported platform."
+@@ -149,7 +149,7 @@
+ static_assert(sizeof(sizeof(char)) == 8, "Expect sizeof(size_t) == 8");
+ #elif defined(DAWN_PLATFORM_IS_I386) || defined(DAWN_PLATFORM_IS_ARM32) ||   \
+     defined(DAWN_PLATFORM_IS_RISCV32) || defined(DAWN_PLATFORM_IS_MIPS32) || \
+-    defined(DAWN_PLATFORM_IS_S390) || defined(DAWN_PLATFORM_IS_PPC32) ||     \
++    defined(DAWN_PLATFORM_IS_S390) || defined(DAWN_PLATFORM_IS_PPC) ||     \
+     defined(DAWN_PLATFORM_IS_EMSCRIPTEN) || defined(DAWN_PLATFORM_IS_LOONGARCH32)
+ #define DAWN_PLATFORM_IS_32_BIT 1
+ static_assert(sizeof(sizeof(char)) == 4, "Expect sizeof(size_t) == 4");
+-- 
+2.34.1
+