diff --git a/fpga/lib/ips/bram.cpp b/fpga/lib/ips/bram.cpp
index 11dda7f67..003e7083f 100644
--- a/fpga/lib/ips/bram.cpp
+++ b/fpga/lib/ips/bram.cpp
@@ -9,7 +9,7 @@ static BramFactory factory;
 bool
 BramFactory::configureJson(IpCore& ip, json_t* json_ip)
 {
-	auto& bram = reinterpret_cast<Bram&>(ip);
+	auto& bram = dynamic_cast<Bram&>(ip);
 
 	if(json_unpack(json_ip, "{ s: i }", "size", &bram.size) != 0) {
 		getLogger()->error("Cannot parse 'size'");
diff --git a/fpga/lib/ips/pcie.cpp b/fpga/lib/ips/pcie.cpp
index d8294469e..ea5675b7d 100644
--- a/fpga/lib/ips/pcie.cpp
+++ b/fpga/lib/ips/pcie.cpp
@@ -125,7 +125,7 @@ bool
 AxiPciExpressBridgeFactory::configureJson(IpCore& ip, json_t* json_ip)
 {
 	auto logger = getLogger();
-	auto& pcie = reinterpret_cast<AxiPciExpressBridge&>(ip);
+	auto& pcie = dynamic_cast<AxiPciExpressBridge&>(ip);
 
 	for(auto barType : std::list<std::string>{"axi_bars", "pcie_bars"}) {
 		json_t* json_bars = json_object_get(json_ip, barType.c_str());
diff --git a/fpga/lib/ips/switch.cpp b/fpga/lib/ips/switch.cpp
index bb0ba0cbc..a06ebbc72 100644
--- a/fpga/lib/ips/switch.cpp
+++ b/fpga/lib/ips/switch.cpp
@@ -143,7 +143,7 @@ AxiStreamSwitchFactory::configureJson(IpCore& ip, json_t* json_ip)
 
 	auto logger = getLogger();
 
-	auto& axiSwitch = reinterpret_cast<AxiStreamSwitch&>(ip);
+	auto& axiSwitch = dynamic_cast<AxiStreamSwitch&>(ip);
 
 	if(json_unpack(json_ip, "{ s: i }", "num_ports", &axiSwitch.num_ports) != 0) {
 		logger->error("Cannot parse 'num_ports'");
diff --git a/fpga/tests/dma.cpp b/fpga/tests/dma.cpp
index e7c462b26..aa43f12a2 100644
--- a/fpga/tests/dma.cpp
+++ b/fpga/tests/dma.cpp
@@ -24,7 +24,7 @@ Test(fpga, dma, .description = "DMA")
 
 		logger->info("Testing {}", *ip);
 
-		auto dma = reinterpret_cast<villas::fpga::ip::Dma&>(*ip);
+		auto dma = dynamic_cast<villas::fpga::ip::Dma&>(*ip);
 
 		if(not dma.loopbackPossible()) {
 			logger->info("Loopback test not possible for {}", *ip);
diff --git a/fpga/tests/fifo.cpp b/fpga/tests/fifo.cpp
index 17cfd3dde..515a5fdac 100644
--- a/fpga/tests/fifo.cpp
+++ b/fpga/tests/fifo.cpp
@@ -47,7 +47,7 @@ Test(fpga, fifo, .description = "FIFO")
 
 		logger->info("Testing {}", *ip);
 
-		auto fifo = reinterpret_cast<villas::fpga::ip::Fifo&>(*ip);
+		auto fifo = dynamic_cast<villas::fpga::ip::Fifo&>(*ip);
 
 		if(not fifo.connectLoopback()) {
 			continue;
diff --git a/fpga/tests/gpu.cpp b/fpga/tests/gpu.cpp
index bdc3aba92..489f86b8c 100644
--- a/fpga/tests/gpu.cpp
+++ b/fpga/tests/gpu.cpp
@@ -40,7 +40,7 @@ Test(fpga, gpu_dma, .description = "GPU DMA tests")
 
 		logger->info("Testing {}", *ip);
 
-		auto bram = reinterpret_cast<villas::fpga::ip::Bram*>(ip.get());
+		auto bram = dynamic_cast<villas::fpga::ip::Bram*>(ip.get());
 		cr_assert_not_null(bram, "Couldn't find BRAM");
 
 		count++;
diff --git a/fpga/tests/timer.cpp b/fpga/tests/timer.cpp
index 66cc71d41..2eb0cfba5 100644
--- a/fpga/tests/timer.cpp
+++ b/fpga/tests/timer.cpp
@@ -46,7 +46,7 @@ Test(fpga, timer, .description = "Timer Counter")
 
 		count++;
 
-		auto timer = reinterpret_cast<villas::fpga::ip::Timer&>(*ip);
+		auto timer = dynamic_cast<villas::fpga::ip::Timer&>(*ip);
 
 		logger->info("Test simple waiting");
 		timer.start(timer.getFrequency() / 10);