diff --git a/frmts/gdalallregister.cpp b/frmts/gdalallregister.cpp
index 4681b0b7b438..9962113135c7 100644
--- a/frmts/gdalallregister.cpp
+++ b/frmts/gdalallregister.cpp
@@ -563,10 +563,6 @@ void CPL_STDCALL GDALAllRegister()
     GDALRegister_COASP();
 #endif
 
-#ifdef FRMT_r
-    GDALRegister_R();
-#endif
-
 #ifdef FRMT_map
     GDALRegister_MAP();
 #endif