diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 9d8be15721..2d75357939 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -10173,7 +10173,7 @@ qemuDomainBlockPeek(virDomainPtr dom,
         goto cleanup;
     }
 
-    if (qemuBlockStorageSourceIsRaw(disk->src)) {
+    if (!qemuBlockStorageSourceIsRaw(disk->src)) {
         virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
                        _("peeking is only supported for disk with 'raw' format not '%1$s'"),
                        virStorageFileFormatTypeToString(disk->src->format));