diff --git a/lib/std/heap.zig b/lib/std/heap.zig
index 9d3c6b89a3..c99395c389 100644
--- a/lib/std/heap.zig
+++ b/lib/std/heap.zig
@@ -739,8 +739,10 @@ const page_size_min_default: ?usize = switch (builtin.os.tag) {
         .x86, .x86_64 => 4 << 10,
         .thumb, .thumbeb, .arm, .armeb => 4 << 10,
         .aarch64, .aarch64_be => 4 << 10,
+        .hppa => 4 << 10,
         .mips, .mipsel, .mips64, .mips64el => 4 << 10,
         .powerpc, .powerpc64, .powerpc64le, .powerpcle => 4 << 10,
+        .sh, .sheb => 4 << 10,
         .sparc => 4 << 10,
         .sparc64 => 8 << 10,
         .riscv32, .riscv64 => 4 << 10,
@@ -895,8 +897,10 @@ const page_size_max_default: ?usize = switch (builtin.os.tag) {
         .x86, .x86_64 => 4 << 10,
         .thumb, .thumbeb, .arm, .armeb => 4 << 10,
         .aarch64, .aarch64_be => 64 << 10,
+        .hppa => 4 << 10,
         .mips, .mipsel, .mips64, .mips64el => 16 << 10,
         .powerpc, .powerpc64, .powerpc64le, .powerpcle => 16 << 10,
+        .sh, .sheb => 4 << 10,
         .sparc => 8 << 10,
         .sparc64 => 8 << 10,
         .riscv32, .riscv64 => 4 << 10,