diff --git a/dlls/ntdll/unix/signal_x86_64.c b/dlls/ntdll/unix/signal_x86_64.c
index 1d0a1461fb2..dd27df88990 100644
--- a/dlls/ntdll/unix/signal_x86_64.c
+++ b/dlls/ntdll/unix/signal_x86_64.c
@@ -2056,6 +2056,67 @@ static inline BOOL emulate_xgetbv( ucontext_t *sigcontext, CONTEXT *context )
     TRACE_(seh)( "emulated an XGETBV instruction\n" );
     return TRUE;
 }
+
+/***********************************************************************
+ *           handle_fndisi
+ *
+ * Check if the fault location is an x87 FNDISI instruction that should be treated as a NOP.
+ */
+static inline BOOL handle_fndisi( ucontext_t *sigcontext, CONTEXT *context )
+{
+    BYTE instr[16];
+    unsigned int i, prefix_count = 0;
+    unsigned int len = virtual_uninterrupted_read_memory( (BYTE *)context->Rip, instr, sizeof(instr) );
+
+    for (i = 0; i < len; i++) switch (instr[i])
+    {
+    /* instruction prefixes */
+    case 0x2e:  /* %cs: */
+    case 0x36:  /* %ss: */
+    case 0x3e:  /* %ds: */
+    case 0x26:  /* %es: */
+    case 0x40:  /* rex */
+    case 0x41:  /* rex */
+    case 0x42:  /* rex */
+    case 0x43:  /* rex */
+    case 0x44:  /* rex */
+    case 0x45:  /* rex */
+    case 0x46:  /* rex */
+    case 0x47:  /* rex */
+    case 0x48:  /* rex */
+    case 0x49:  /* rex */
+    case 0x4a:  /* rex */
+    case 0x4b:  /* rex */
+    case 0x4c:  /* rex */
+    case 0x4d:  /* rex */
+    case 0x4e:  /* rex */
+    case 0x4f:  /* rex */
+    case 0x64:  /* %fs: */
+    case 0x65:  /* %gs: */
+    case 0x66:  /* opcode size */
+    case 0x67:  /* addr size */
+    case 0xf0:  /* lock */
+    case 0xf2:  /* repne */
+    case 0xf3:  /* repe */
+        if (++prefix_count >= 15) return FALSE;
+        continue;
+
+    case 0xdb:
+        if (i == len - 1) return 0;
+        switch (instr[i + 1])
+        {
+        case 0xe1:
+            /* RDSSPD/RDSSPQ: (prefixes) DB E1 */
+            RIP_sig(sigcontext) += prefix_count + 2;
+            TRACE_(seh)( "skipped FNDISI instruction\n" );
+            return TRUE;
+        }
+        break;
+    default:
+        return FALSE;
+    }
+    return FALSE;
+}
 #endif
 
 /***********************************************************************
@@ -2407,6 +2468,8 @@ static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext )
         if (handle_cet_nop( ucontext, &context.c )) return;
         /* CW HACK 23427 */
         if (emulate_xgetbv( ucontext, &context.c )) return;
+        /* Winehq Bug 56441 */
+        if (handle_fndisi( ucontext, &context.c )) return;
 #endif
         rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
         break;