diff --git a/sys/powerpc/powerpc/trap.c b/sys/powerpc/powerpc/trap.c
index b3217628943..a98b5c77ef5 100644
--- a/sys/powerpc/powerpc/trap.c
+++ b/sys/powerpc/powerpc/trap.c
@@ -280,7 +280,7 @@ trap(struct trapframe *frame)
 		case EXC_DEBUG:	/* Single stepping */
 			mtspr(SPR_DBSR, mfspr(SPR_DBSR));
 			frame->srr1 &= ~PSL_DE;
-			frame->cpu.booke.dbcr0 &= ~(DBCR0_IDM || DBCR0_IC);
+			frame->cpu.booke.dbcr0 &= ~(DBCR0_IDM | DBCR0_IC);
 			sig = SIGTRAP;
 			ucode = TRAP_TRACE;
 			break;