diff --git a/src/emu/modrm.h b/src/emu/modrm.h
index d0892a8a4..e021464ba 100755
--- a/src/emu/modrm.h
+++ b/src/emu/modrm.h
@@ -108,7 +108,7 @@
             case 7: base =      R_BX; break;    \
         }                                       \
         switch((m>>6)&3) {                      \
-            case 0: if(m&7==6) base = F16S; break; \
+            case 0: if((m&7)==6) base = F16S; break; \
             case 1: base += F8S; break;         \
             case 2: base += F16S; break;        \
         }                                       \