diff --git a/lib/Target/X86/X86InstrFormats.td b/lib/Target/X86/X86InstrFormats.td
index 6151d5cce27..44e574d2465 100644
--- a/lib/Target/X86/X86InstrFormats.td
+++ b/lib/Target/X86/X86InstrFormats.td
@@ -570,7 +570,7 @@ class FMA3<bits<8> o, Format F, dag outs, dag ins, string asm,
 // FMA4 Instruction Templates
 class FMA4<bits<8> o, Format F, dag outs, dag ins, string asm,
            list<dag>pattern, InstrItinClass itin = IIC_DEFAULT>
-      : I<o, F, outs, ins, asm, pattern, itin>, TA,
+      : Ii8<o, F, outs, ins, asm, pattern, itin>, TA,
         OpSize, VEX_4V, VEX_I8IMM, Requires<[HasFMA4]>;
 
 // XOP 2, 3 and 4 Operand Instruction Template
diff --git a/test/MC/X86/x86_64-fma4-encoding.s b/test/MC/X86/x86_64-fma4-encoding.s
index 805fc23cf4c..f7ee351ab51 100644
--- a/test/MC/X86/x86_64-fma4-encoding.s
+++ b/test/MC/X86/x86_64-fma4-encoding.s
@@ -73,6 +73,67 @@
 // CHECK: encoding: [0xc4,0xe3,0xfd,0x69,0xc2,0x10]
           vfmaddpd   %ymm2, %ymm1, %ymm0, %ymm0
 
+// PR15040
+// CHECK: vfmaddss  foo(%rip), %xmm1, %xmm0, %xmm0
+// CHECK: encoding: [0xc4,0xe3,0xf9,0x6a,0x05,A,A,A,A,0x10]
+// CHECK: fixup A - offset: 5, value: foo-5, kind: reloc_riprel_4byte
+          vfmaddss  foo(%rip), %xmm1, %xmm0, %xmm0
+
+// CHECK: vfmaddss   %xmm1, foo(%rip), %xmm0, %xmm0
+// CHECK: encoding: [0xc4,0xe3,0x79,0x6a,0x05,A,A,A,A,0x10]
+// CHECK: fixup A - offset: 5, value: foo-5, kind: reloc_riprel_4byte
+          vfmaddss   %xmm1, foo(%rip),%xmm0, %xmm0
+
+// CHECK: vfmaddsd  foo(%rip), %xmm1, %xmm0, %xmm0
+// CHECK: encoding: [0xc4,0xe3,0xf9,0x6b,0x05,A,A,A,A,0x10]
+// CHECK: fixup A - offset: 5, value: foo-5, kind: reloc_riprel_4byte
+          vfmaddsd  foo(%rip), %xmm1, %xmm0, %xmm0
+
+// CHECK: vfmaddsd   %xmm1, foo(%rip), %xmm0, %xmm0
+// CHECK: encoding: [0xc4,0xe3,0x79,0x6b,0x05,A,A,A,A,0x10]
+// CHECK: fixup A - offset: 5, value: foo-5, kind: reloc_riprel_4byte
+          vfmaddsd   %xmm1, foo(%rip),%xmm0, %xmm0
+
+// CHECK: vfmaddps  foo(%rip), %xmm1, %xmm0, %xmm0
+// CHECK: encoding: [0xc4,0xe3,0xf9,0x68,0x05,A,A,A,A,0x10]
+// CHECK: fixup A - offset: 5, value: foo-5, kind: reloc_riprel_4byte
+          vfmaddps  foo(%rip), %xmm1, %xmm0, %xmm0
+
+// CHECK: vfmaddps   %xmm1, foo(%rip), %xmm0, %xmm0
+// CHECK: encoding: [0xc4,0xe3,0x79,0x68,0x05,A,A,A,A,0x10]
+// CHECK: fixup A - offset: 5, value: foo-5, kind: reloc_riprel_4byte
+          vfmaddps   %xmm1, foo(%rip),%xmm0, %xmm0
+
+// CHECK: vfmaddpd  foo(%rip), %xmm1, %xmm0, %xmm0
+// CHECK: encoding: [0xc4,0xe3,0xf9,0x69,0x05,A,A,A,A,0x10]
+// CHECK: fixup A - offset: 5, value: foo-5, kind: reloc_riprel_4byte
+          vfmaddpd  foo(%rip), %xmm1, %xmm0, %xmm0
+
+// CHECK: vfmaddpd   %xmm1, foo(%rip), %xmm0, %xmm0
+// CHECK: encoding: [0xc4,0xe3,0x79,0x69,0x05,A,A,A,A,0x10]
+// CHECK: fixup A - offset: 5, value: foo-5, kind: reloc_riprel_4byte
+          vfmaddpd   %xmm1, foo(%rip),%xmm0, %xmm0
+
+// CHECK: vfmaddps  foo(%rip), %ymm1, %ymm0, %ymm0
+// CHECK: encoding: [0xc4,0xe3,0xfd,0x68,0x05,A,A,A,A,0x10]
+// CHECK: fixup A - offset: 5, value: foo-5, kind: reloc_riprel_4byte
+          vfmaddps  foo(%rip), %ymm1, %ymm0, %ymm0
+
+// CHECK: vfmaddps   %ymm1, foo(%rip), %ymm0, %ymm0
+// CHECK: encoding: [0xc4,0xe3,0x7d,0x68,0x05,A,A,A,A,0x10]
+// CHECK: fixup A - offset: 5, value: foo-5, kind: reloc_riprel_4byte
+          vfmaddps   %ymm1, foo(%rip),%ymm0, %ymm0
+
+// CHECK: vfmaddpd  foo(%rip), %ymm1, %ymm0, %ymm0
+// CHECK: encoding: [0xc4,0xe3,0xfd,0x69,0x05,A,A,A,A,0x10]
+// CHECK: fixup A - offset: 5, value: foo-5, kind: reloc_riprel_4byte
+          vfmaddpd  foo(%rip), %ymm1, %ymm0, %ymm0
+
+// CHECK: vfmaddpd   %ymm1, foo(%rip), %ymm0, %ymm0
+// CHECK: encoding: [0xc4,0xe3,0x7d,0x69,0x05,A,A,A,A,0x10]
+// CHECK: fixup A - offset: 5, value: foo-5, kind: reloc_riprel_4byte
+          vfmaddpd   %ymm1, foo(%rip),%ymm0, %ymm0
+
 // vfmsub
 // CHECK: vfmsubss  (%rcx), %xmm1, %xmm0, %xmm0
 // CHECK: encoding: [0xc4,0xe3,0xf9,0x6e,0x01,0x10]