diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 41162e8553..3770a82fa3 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -23716,7 +23716,7 @@ virDomainDiskSourceFormatPrivateData(virBufferPtr buf,
 }
 
 
-int
+static int
 virDomainStorageSourceFormat(virBufferPtr attrBuf,
                              virBufferPtr childBuf,
                              virStorageSourcePtr src,
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index f0c2a51212..cca81be013 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -3457,11 +3457,6 @@ int virDomainDiskDefCheckDuplicateInfo(const virDomainDiskDef *a,
                                        const virDomainDiskDef *b)
     ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
 
-int virDomainStorageSourceFormat(virBufferPtr attrBuf,
-                                 virBufferPtr childBuf,
-                                 virStorageSourcePtr src,
-                                 unsigned int flags)
-    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3);
 
 int virDomainStorageSourceParse(xmlNodePtr node,
                                 xmlXPathContextPtr ctxt,
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 1e96089a90..5bc807a2f1 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -564,7 +564,6 @@ virDomainStateReasonToString;
 virDomainStateTypeFromString;
 virDomainStateTypeToString;
 virDomainStorageNetworkParseHost;
-virDomainStorageSourceFormat;
 virDomainStorageSourceParse;
 virDomainTaintTypeFromString;
 virDomainTaintTypeToString;