diff --git a/Zend/Optimizer/zend_inference.c b/Zend/Optimizer/zend_inference.c
index 92958baf22b..7bc165c1c48 100644
--- a/Zend/Optimizer/zend_inference.c
+++ b/Zend/Optimizer/zend_inference.c
@@ -4010,7 +4010,7 @@ static bool can_convert_to_double(
 	for (phi = var->phi_use_chain; phi; phi = zend_ssa_next_use_phi(ssa, var_num, phi)) {
 		/* Check that narrowing can actually be useful */
 		type = ssa->var_info[phi->ssa_var].type;
-		if (type & ((MAY_BE_ANY|MAY_BE_UNDEF) - (MAY_BE_LONG|MAY_BE_DOUBLE))) {
+		if ((type & MAY_BE_ANY) & ~(MAY_BE_LONG|MAY_BE_DOUBLE)) {
 			return 0;
 		}
 
@@ -4357,8 +4357,10 @@ static zend_result zend_infer_types(const zend_op_array *op_array, const zend_sc
 		return FAILURE;
 	}
 
-	/* Narrowing integer initialization to doubles */
-	zend_type_narrowing(op_array, script, ssa, optimization_level);
+	if (optimization_level & ZEND_OPTIMIZER_NARROW_TO_DOUBLE) {
+		/* Narrowing integer initialization to doubles */
+		zend_type_narrowing(op_array, script, ssa, optimization_level);
+	}
 
 	if (ZEND_FUNC_INFO(op_array)) {
 		zend_func_return_info(op_array, script, 1, 0, &ZEND_FUNC_INFO(op_array)->return_info);
diff --git a/Zend/Optimizer/zend_optimizer.h b/Zend/Optimizer/zend_optimizer.h
index c063d65a459..16bfd75520d 100644
--- a/Zend/Optimizer/zend_optimizer.h
+++ b/Zend/Optimizer/zend_optimizer.h
@@ -44,6 +44,8 @@
 
 #define ZEND_OPTIMIZER_IGNORE_OVERLOADING	(1<<16)  /* (unsafe) Ignore possibility of operator overloading */
 
+#define ZEND_OPTIMIZER_NARROW_TO_DOUBLE		(1<<17)  /* try to narrow long constant assignments to double */
+
 #define ZEND_OPTIMIZER_ALL_PASSES	0x7FFFFFFF
 
 #define DEFAULT_OPTIMIZATION_LEVEL  "0x7FFEBFFF"
diff --git a/ext/opcache/jit/zend_jit.c b/ext/opcache/jit/zend_jit.c
index 720680a8f19..2dd98afefdc 100644
--- a/ext/opcache/jit/zend_jit.c
+++ b/ext/opcache/jit/zend_jit.c
@@ -1332,7 +1332,8 @@ static int zend_jit_op_array_analyze2(const zend_op_array *op_array, zend_script
 	 && op_array->last_try_catch == 0
 	 && !(op_array->fn_flags & ZEND_ACC_GENERATOR)
 	 && !(ssa->cfg.flags & ZEND_FUNC_INDIRECT_VAR_ACCESS)) {
-		if (zend_ssa_inference(&CG(arena), op_array, script, ssa, optimization_level) != SUCCESS) {
+		if (zend_ssa_inference(&CG(arena), op_array, script, ssa,
+				optimization_level & ~ZEND_OPTIMIZER_NARROW_TO_DOUBLE) != SUCCESS) {
 			return FAILURE;
 		}
 	}