diff --git a/core/rexcode/wasm/decoder.odin b/core/rexcode/wasm/decoder.odin
index 30a4abebb..cd22997a0 100644
--- a/core/rexcode/wasm/decoder.odin
+++ b/core/rexcode/wasm/decoder.odin
@@ -66,6 +66,7 @@ decode :: proc(
 }
 
 
+@(require_results)
 decode_one :: proc(
 	data:      []u8,
 	relocs:    []Relocation,
@@ -230,7 +231,7 @@ decode_one :: proc(
 
 // Which index space the IDX immediate in operand slot `which` addresses, by
 // mnemonic. Mirrors how the builders in instructions.odin tag each operand.
-@(private="file")
+@(private="file", require_results)
 idx_kind_for :: #force_inline proc "contextless" (m: Mnemonic, which: int) -> Index_Kind {
 	#partial switch m {
 	case .BR, .BR_IF:                           return .LABEL
@@ -247,7 +248,7 @@ idx_kind_for :: #force_inline proc "contextless" (m: Mnemonic, which: int) -> In
 	return .NONE
 }
 
-@(private="file")
+@(private="file", require_results)
 reloc_label_at :: #force_inline proc "contextless" (relocs: []Relocation, offset: u32) -> (label_id: u32, found: bool) {
 	for r in relocs {
 		if r.offset == offset {
diff --git a/core/rexcode/wasm/encoding_types.odin b/core/rexcode/wasm/encoding_types.odin
index e8f677b08..2a2c6fdce 100644
--- a/core/rexcode/wasm/encoding_types.odin
+++ b/core/rexcode/wasm/encoding_types.odin
@@ -132,6 +132,7 @@ write_uleb_padded5 :: #force_inline proc "contextless" (code: []u8, offset: ^u32
 	}
 }
 
+@(require_results)
 uleb_size :: #force_inline proc "contextless" (value: u64) -> u32 {
 	v := value
 	n: u32 = 1
@@ -141,6 +142,7 @@ uleb_size :: #force_inline proc "contextless" (value: u64) -> u32 {
 	return n
 }
 
+@(require_results)
 sleb_size :: #force_inline proc "contextless" (value: i64) -> u32 {
 	v := value
 	n: u32 = 0
diff --git a/core/rexcode/wasm/printer.odin b/core/rexcode/wasm/printer.odin
index 6c7b3a381..4c002800f 100644
--- a/core/rexcode/wasm/printer.odin
+++ b/core/rexcode/wasm/printer.odin
@@ -41,6 +41,7 @@ Print_Options         :: isa.Print_Options
 Print_Result          :: isa.Print_Result
 DEFAULT_PRINT_OPTIONS :: isa.DEFAULT_PRINT_OPTIONS
 
+@(require_results)
 mnemonic_to_string :: proc(m: Mnemonic, lowercase: bool = true, allocator := context.temp_allocator) -> string {
 	sb := strings.builder_make(allocator)
 	write_mnemonic(&sb, m, !lowercase)