diff --git a/src/cmd/asm/internal/asm/asm.go b/src/cmd/asm/internal/asm/asm.go
index b960d8f022..9fc7fa5598 100644
--- a/src/cmd/asm/internal/asm/asm.go
+++ b/src/cmd/asm/internal/asm/asm.go
@@ -353,6 +353,7 @@ func (p *Parser) asmPCAlign(operands [][]lex.Token) {
 	prog := &obj.Prog{
 		Ctxt: p.ctxt,
 		As:   obj.APCALIGN,
+		Pos:  p.pos(),
 		From: key,
 	}
 	p.append(prog, "", true)
diff --git a/src/cmd/asm/internal/asm/testdata/ppc64.s b/src/cmd/asm/internal/asm/testdata/ppc64.s
index 918c2e1681..e2c1000e0b 100644
--- a/src/cmd/asm/internal/asm/testdata/ppc64.s
+++ b/src/cmd/asm/internal/asm/testdata/ppc64.s
@@ -1156,6 +1156,8 @@ TEXT asmtest(SB),DUPOK|NOSPLIT,$0
 	MOVD 4(R1), SPR(3)              // ebe100047fe303a6
 	MOVD 4(R1), XER                 // ebe100047fe103a6
 	OR $0, R0, R0                   // 60000000
+
+	PCALIGN $16
 	PNOP                            // 0700000000000000
 
 	SETB CR1,R3                     // 7c640100