diff --git a/ethminer/MinerAux.h b/ethminer/MinerAux.h
index f84a916cb..8d7df3f79 100644
--- a/ethminer/MinerAux.h
+++ b/ethminer/MinerAux.h
@@ -243,8 +243,9 @@ public:
 			{
 				try
 				{
-					m_openclDevices[m_openclDeviceCount++] = stol(argv[++i]);
-				}
+					m_openclDevices[m_openclDeviceCount] = stol(argv[++i]);
+					++m_openclDeviceCount;
+                }
 				catch (...)
 				{
 					i--;
@@ -286,7 +287,8 @@ public:
 			{
 				try
 				{
-					m_cudaDevices[m_cudaDeviceCount++] = stol(argv[++i]);
+					m_cudaDevices[m_cudaDeviceCount] = stol(argv[++i]);
+					++m_cudaDeviceCount;
 				}
 				catch (...)
 				{