diff --git a/kernel/kernel/Process.cpp b/kernel/kernel/Process.cpp
index a17f037d1..0a0856a6a 100644
--- a/kernel/kernel/Process.cpp
+++ b/kernel/kernel/Process.cpp
@@ -867,15 +867,7 @@ namespace Kernel
 		ASSERT(this == &Process::current());
 		
 		CriticalScope _;
-		
-		// FIXME: support raise with signal blocked
-		Thread& current = Thread::current();
-		if (current.add_signal(signal))
-		{
-			current.handle_signal(signal);
-			return 0;
-		}
-
+		Thread::current().handle_signal(-signal);
 		ASSERT_NOT_REACHED();
 	}
 
diff --git a/kernel/kernel/Thread.cpp b/kernel/kernel/Thread.cpp
index 5a2307b46..51804c3f3 100644
--- a/kernel/kernel/Thread.cpp
+++ b/kernel/kernel/Thread.cpp
@@ -253,13 +253,17 @@ namespace Kernel
 			}
 			ASSERT(signal <= _SIGMAX);
 		}
-		else
+		else if (signal > 0)
 		{
 			uint64_t full_pending_mask = m_signal_pending_mask | process().m_signal_pending_mask;
 			uint64_t mask = 1ull << signal;
 			ASSERT(full_pending_mask & mask);
 			ASSERT(!(m_signal_block_mask & mask));
 		}
+		else
+		{
+			signal = -signal;
+		}
 
 		uintptr_t& return_rsp = this->return_rsp();
 		uintptr_t& return_rip = this->return_rip();