diff --git a/rpcs3/Emu/Cell/Modules/cellKb.cpp b/rpcs3/Emu/Cell/Modules/cellKb.cpp
index 0112070fb4..7bf6a67b14 100644
--- a/rpcs3/Emu/Cell/Modules/cellKb.cpp
+++ b/rpcs3/Emu/Cell/Modules/cellKb.cpp
@@ -177,6 +177,9 @@ error_code cellKbSetCodeType(u32 port_no, u32 type)
 
 	if (!handler)
 		return CELL_KB_ERROR_UNINITIALIZED;
+
+	if (port_no >= handler->GetKeyboards().size())
+		return CELL_KB_ERROR_INVALID_PARAMETER;
 	
 	KbConfig& current_config = handler->GetConfig(port_no);
 	current_config.code_type = type;
@@ -197,6 +200,9 @@ error_code cellKbSetReadMode(u32 port_no, u32 rmode)
 
 	if (!handler)
 		return CELL_KB_ERROR_UNINITIALIZED;
+
+	if (port_no >= handler->GetKeyboards().size())
+		return CELL_KB_ERROR_INVALID_PARAMETER;
 	
 	KbConfig& current_config = handler->GetConfig(port_no);
 	current_config.read_mode = rmode;
@@ -213,6 +219,9 @@ error_code cellKbGetConfiguration(u32 port_no, vm::ptr<CellKbConfig> config)
 	if (!handler)
 		return CELL_KB_ERROR_UNINITIALIZED;
 
+	if (port_no >= handler->GetKeyboards().size())
+		return CELL_KB_ERROR_INVALID_PARAMETER;
+
 	const KbConfig& current_config = handler->GetConfig(port_no);
 	config->arrange = current_config.arrange;
 	config->read_mode = current_config.read_mode;