diff --git a/xmrstak/backend/amd/minethd.cpp b/xmrstak/backend/amd/minethd.cpp
index 313ba84dfd0c1dbbe45e7140546537bd74a6d198..37a064d0288c59fc11af16e2509bd70f23e34922 100644
--- a/xmrstak/backend/amd/minethd.cpp
+++ b/xmrstak/backend/amd/minethd.cpp
@@ -242,7 +242,7 @@ void minethd::work_main()
 
 				if((results[i] | 0xEB000000u) != 0xEB000000u)
 				{
-					printf("Invalid NH nonce on AMD - 0x%x\n", results[i]);
+					printf("Invalid NH nonce on AMD - 0x%.8x\n", results[i]);
 					exit(0);
 				}
 
diff --git a/xmrstak/backend/cpu/minethd.cpp b/xmrstak/backend/cpu/minethd.cpp
index c33afd6647aebbbd43e05e57c0afdad9a27c5f5b..e3804d2c843df8618cfbd6f94bf0e0108ef9a478 100644
--- a/xmrstak/backend/cpu/minethd.cpp
+++ b/xmrstak/backend/cpu/minethd.cpp
@@ -409,7 +409,7 @@ void minethd::work_main()
 			{
 				if((result.iNonce | 0xEB000000u) != 0xEB000000u)
 				{
-					printf("Invalid NH nonce on CPU SINGLE - 0x%x\n", result.iNonce);
+					printf("Invalid NH nonce on CPU SINGLE - 0x%.8x\n", result.iNonce);
 					exit(0);
 				}
 
@@ -565,7 +565,7 @@ void minethd::double_work_main()
 
 				if((iNonce-1 | 0xEB000000u) != 0xEB000000u)
 				{
-					printf("Invalid NH nonce on CPU DOUBLE - 0x%x\n", iNonce-1);
+					printf("Invalid NH nonce on CPU DOUBLE - 0x%.8x\n", iNonce-1);
 					exit(0);
 				}
 			}
@@ -576,7 +576,7 @@ void minethd::double_work_main()
 
 				if((iNonce | 0xEB000000u) != 0xEB000000u)
 				{
-					printf("Invalid NH nonce on CPU DOUBLE - 0x%x\n", iNonce);
+					printf("Invalid NH nonce on CPU DOUBLE - 0x%.8x\n", iNonce);
 					exit(0);
 				}
 			}
diff --git a/xmrstak/backend/nvidia/minethd.cpp b/xmrstak/backend/nvidia/minethd.cpp
index 1b1b33fe224c885d2aa8ee886964287bce814ea5..b92c37176d0dfbf5862099134aa255c03747fd19 100644
--- a/xmrstak/backend/nvidia/minethd.cpp
+++ b/xmrstak/backend/nvidia/minethd.cpp
@@ -284,7 +284,7 @@ void minethd::work_main()
 
 				if((foundNonce[i] | 0xEB000000u) != 0xEB000000u)
 				{
-					printf("Invalid NH nonce on NVIDIA - 0x%x\n", foundNonce[i];
+					printf("Invalid NH nonce on NVIDIA - 0x%.8x\n", foundNonce[i]);
 					exit(0);
 				}