diff --git a/src/checker_builtin_procs.hpp b/src/checker_builtin_procs.hpp
index 05f256775..3ea6fcdd5 100644
--- a/src/checker_builtin_procs.hpp
+++ b/src/checker_builtin_procs.hpp
@@ -434,7 +434,7 @@ gb_global BuiltinProc builtin_procs[BuiltinProc_COUNT] = {
 
 	{STR_LIT("simd_neg"), 1, false, Expr_Expr, BuiltinProcPkg_intrinsics},
 
-	{STR_LIT("simd_abs"), 2, false, Expr_Expr, BuiltinProcPkg_intrinsics},
+	{STR_LIT("simd_abs"), 1, false, Expr_Expr, BuiltinProcPkg_intrinsics},
 
 	{STR_LIT("simd_min"), 2, false, Expr_Expr, BuiltinProcPkg_intrinsics},
 	{STR_LIT("simd_max"), 2, false, Expr_Expr, BuiltinProcPkg_intrinsics},