diff --git a/srcpkgs/mozjs91/patches/fix-build-ppc32.patch b/srcpkgs/mozjs91/patches/fix-build-ppc32.patch
new file mode 100644
index 00000000000..066330731e5
--- /dev/null
+++ b/srcpkgs/mozjs91/patches/fix-build-ppc32.patch
@@ -0,0 +1,19 @@
+commit 32e52128ce8fe7704a29a5a4fb921a8394540fbc
+Author: q66 <daniel@octaforge.org>
+Date:   Mon Jun 13 14:01:59 2022 +0200
+
+    fix ftbfs on powerpc32
+
+diff --git a/js/src/wasm/WasmFrame.h b/js/src/wasm/WasmFrame.h
+index 85f2612d..df5c9629 100644
+--- a/js/src/wasm/WasmFrame.h
++++ b/js/src/wasm/WasmFrame.h
+@@ -230,7 +230,7 @@ class DebugFrame {
+   // Avoid -Wunused-private-field warnings.
+  protected:
+ #if defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_ARM) || \
+-    defined(JS_CODEGEN_X86) || defined(__wasi__)
++    defined(JS_CODEGEN_X86) || defined(__wasi__) || (defined(__powerpc__) && !defined(__powerpc64__))
+   // See alignmentStaticAsserts().  For MIPS32, ARM32 and X86 DebugFrame is only
+   // 4-byte aligned, so we add another word to get up to 8-byte
+   // alignment.