diff --git a/makefile b/makefile
index cd4789d4..6fa84e73 100644
--- a/makefile
+++ b/makefile
@@ -113,6 +113,9 @@ FLAGS = $(FLAGS) /Ob0 /Zi /Oy-
 DEFS = $(DEFS) -DMTY_VK_DEBUG
 !ELSE
 FLAGS = $(FLAGS) /O2 /GS- /Gw
+!IFDEF RELEASE_PDB
+FLAGS = $(FLAGS) /Zi
+!ENDIF
 !ENDIF
 
 CFLAGS = $(INCLUDES) $(DEFS) $(FLAGS)