diff --git a/src/cpu/core_normal/prefix_0f.h b/src/cpu/core_normal/prefix_0f.h
index 086771b7..0f229830 100644
--- a/src/cpu/core_normal/prefix_0f.h
+++ b/src/cpu/core_normal/prefix_0f.h
@@ -148,7 +148,7 @@
 			Bitu which=(rm >> 3) & 7;
 			if (rm < 0xc0 ) {
 				rm |= 0xc0;
-				LOG(LOG_CPU,LOG_ERROR)("MOV XXX,CR%d with non-register",which);
+				LOG(LOG_CPU,LOG_ERROR)("MOV XXX,CR%u with non-register",which);
 			}
 			GetEArd;
 			Bit32u crx_value;
@@ -162,7 +162,7 @@
 			Bitu which=(rm >> 3) & 7;
 			if (rm < 0xc0 ) {
 				rm |= 0xc0;
-				LOG(LOG_CPU,LOG_ERROR)("MOV XXX,DR% with non-register",which);
+				LOG(LOG_CPU,LOG_ERROR)("MOV XXX,DR%u with non-register",which);
 			}
 			GetEArd;
 			Bit32u drx_value;
@@ -176,7 +176,7 @@
 			Bitu which=(rm >> 3) & 7;
 			if (rm < 0xc0 ) {
 				rm |= 0xc0;
-				LOG(LOG_CPU,LOG_ERROR)("MOV XXX,CR% with non-register",which);
+				LOG(LOG_CPU,LOG_ERROR)("MOV XXX,CR%u with non-register",which);
 			}
 			GetEArd;
 			if (CPU_WRITE_CRX(which,*eard)) RUNEXCEPTION();
@@ -188,7 +188,7 @@
 			Bitu which=(rm >> 3) & 7;
 			if (rm < 0xc0 ) {
 				rm |= 0xc0;
-				LOG(LOG_CPU,LOG_ERROR)("MOV DR%,XXX with non-register",which);
+				LOG(LOG_CPU,LOG_ERROR)("MOV DR%u,XXX with non-register",which);
 			}
 			GetEArd;
 			if (CPU_WRITE_DRX(which,*eard)) RUNEXCEPTION();
@@ -200,7 +200,7 @@
 			Bitu which=(rm >> 3) & 7;
 			if (rm < 0xc0 ) {
 				rm |= 0xc0;
-				LOG(LOG_CPU,LOG_ERROR)("MOV XXX,TR% with non-register",which);
+				LOG(LOG_CPU,LOG_ERROR)("MOV XXX,TR%u with non-register",which);
 			}
 			GetEArd;
 			Bit32u trx_value;
@@ -214,7 +214,7 @@
 			Bitu which=(rm >> 3) & 7;
 			if (rm < 0xc0 ) {
 				rm |= 0xc0;
-				LOG(LOG_CPU,LOG_ERROR)("MOV TR%,XXX with non-register",which);
+				LOG(LOG_CPU,LOG_ERROR)("MOV TR%u,XXX with non-register",which);
 			}
 			GetEArd;
 			if (CPU_WRITE_TRX(which,*eard)) RUNEXCEPTION();