diff --git a/Zend/Optimizer/sccp.c b/Zend/Optimizer/sccp.c
index 620cdd1f49f0..c62fabd54374 100644
--- a/Zend/Optimizer/sccp.c
+++ b/Zend/Optimizer/sccp.c
@@ -765,9 +765,6 @@ static inline zend_result ct_eval_array_key_exists(zval *result, const zval *op1
 	if (Z_TYPE_P(op2) != IS_ARRAY && !IS_PARTIAL_ARRAY(op2)) {
 		return FAILURE;
 	}
-	if (Z_TYPE_P(op1) != IS_STRING && Z_TYPE_P(op1) != IS_LONG && Z_TYPE_P(op1) != IS_NULL) {
-		return FAILURE;
-	}
 	if (fetch_array_elem(&value, op2, op1) == FAILURE) {
 		return FAILURE;
 	}
diff --git a/ext/opcache/tests/opt/sccp_array_key_exists.phpt b/ext/opcache/tests/opt/sccp_array_key_exists.phpt
new file mode 100644
index 000000000000..af45088d8da8
--- /dev/null
+++ b/ext/opcache/tests/opt/sccp_array_key_exists.phpt
@@ -0,0 +1,45 @@
+--TEST--
+SCCP: Evaluate array_key_exists with boolean and integral float keys, but not NAN or null
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+opcache.optimization_level=-1
+opcache.opt_debug_level=0x20000
+opcache.preload=
+--EXTENSIONS--
+opcache
+--FILE--
+<?php
+function test() {
+    var_dump(
+        array_key_exists(true, [1 => null]),
+        array_key_exists(false, [1 => null]),
+        array_key_exists(-1.0, [-1 => null]),
+        array_key_exists(2.0, [1 => null]),
+        array_key_exists(NAN, [0 => null]),
+        array_key_exists(null, ['' => null]),
+    );
+}
+?>
+--EXPECTF--
+$_main:
+     ; (lines=1, args=0, vars=0, tmps=0)
+     ; (after optimizer)
+     ; %s:%d-%d
+0000 RETURN int(1)
+
+test:
+     ; (lines=11, args=0, vars=0, tmps=1)
+     ; (after optimizer)
+     ; %s:%d-%d
+0000 INIT_FCALL 6 %d string("var_dump")
+0001 SEND_VAL bool(true) 1
+0002 SEND_VAL bool(false) 2
+0003 SEND_VAL bool(true) 3
+0004 SEND_VAL bool(false) 4
+0005 T0 = ARRAY_KEY_EXISTS float(%r[Nn][Aa][Nn]%r) array(...)
+0006 SEND_VAL T0 5
+0007 T0 = ARRAY_KEY_EXISTS null array(...)
+0008 SEND_VAL T0 6
+0009 DO_ICALL
+0010 RETURN null