diff --git a/ext/pcntl/pcntl.c b/ext/pcntl/pcntl.c
index 6558ef8dcdd04..e11de304b1b79 100644
--- a/ext/pcntl/pcntl.c
+++ b/ext/pcntl/pcntl.c
@@ -1355,7 +1355,7 @@ static void pcntl_signal_handler(int signo)
 		PCNTL_G(head) = psig;
 	}
 	PCNTL_G(tail) = psig;
-	PCNTL_G(pending_signals) = 1;
+	PCNTL_G(pending_signals) = true;
 	if (PCNTL_G(async_signals)) {
 		zend_atomic_bool_store_ex(&EG(vm_interrupt), true);
 	}
@@ -1386,7 +1386,7 @@ void pcntl_signal_dispatch(void)
 	zend_fiber_switch_block();
 
 	/* Prevent reentrant handler calls */
-	PCNTL_G(processing_signal_queue) = 1;
+	PCNTL_G(processing_signal_queue) = true;
 
 	queue = PCNTL_G(head);
 	PCNTL_G(head) = NULL; /* simple stores are atomic */
@@ -1418,10 +1418,10 @@ void pcntl_signal_dispatch(void)
 		queue = next;
 	}
 
-	PCNTL_G(pending_signals) = 0;
+	PCNTL_G(pending_signals) = false;
 
 	/* Re-enable queue */
-	PCNTL_G(processing_signal_queue) = 0;
+	PCNTL_G(processing_signal_queue) = false;
 
 	/* Re-enable fiber switching */
 	zend_fiber_switch_unblock();
diff --git a/ext/pcntl/php_pcntl.h b/ext/pcntl/php_pcntl.h
index f09ccadcd3cdb..f2cc0d59195f4 100644
--- a/ext/pcntl/php_pcntl.h
+++ b/ext/pcntl/php_pcntl.h
@@ -43,12 +43,12 @@ struct php_pcntl_pending_signal {
 
 ZEND_BEGIN_MODULE_GLOBALS(pcntl)
 	HashTable php_signal_table;
-	int processing_signal_queue;
-	struct php_pcntl_pending_signal *head, *tail, *spares;
-	int last_error;
-	volatile char pending_signals;
+	bool processing_signal_queue;
+	volatile bool pending_signals;
 	bool async_signals;
-	unsigned num_signals;
+	uint8_t num_signals;
+	int last_error;
+	struct php_pcntl_pending_signal *head, *tail, *spares;
 ZEND_END_MODULE_GLOBALS(pcntl)
 
 #if defined(ZTS) && defined(COMPILE_DL_PCNTL)