diff --git a/src/hb-aat-layout-kerx-table.hh b/src/hb-aat-layout-kerx-table.hh
index d55d5f7a5..a395e76ab 100644
--- a/src/hb-aat-layout-kerx-table.hh
+++ b/src/hb-aat-layout-kerx-table.hh
@@ -768,7 +768,7 @@ struct KerxSubTableHeader
 {
   typedef ExtendedTypes Types;
 
-  unsigned int tuple_count (void) const { return tupleCount; }
+  inline unsigned int tuple_count (void) const { return tupleCount; }
 
   enum Coverage
   {
diff --git a/src/hb-ot-kern-table.hh b/src/hb-ot-kern-table.hh
index 27829d84f..f8b1aa7a5 100644
--- a/src/hb-ot-kern-table.hh
+++ b/src/hb-ot-kern-table.hh
@@ -247,7 +247,8 @@ struct KernOT : KernTable<KernOT>
   {
     typedef AAT::ObsoleteTypes Types;
 
-    unsigned int tuple_count (void) const { return 0; }
+    inline unsigned int tuple_count (void) const { return 0; }
+
 
     enum Coverage
     {
@@ -294,7 +295,7 @@ struct KernAAT : KernTable<KernAAT>
   {
     typedef AAT::ObsoleteTypes Types;
 
-    unsigned int tuple_count (void) const { return 0; }
+    inline unsigned int tuple_count (void) const { return 0; }
 
     enum Coverage
     {