diff --git a/config/optimize b/config/optimize
index 843d399388..1c57ae69f7 100644
--- a/config/optimize
+++ b/config/optimize
@@ -47,9 +47,9 @@ CFLAGS_OPTIM_DEBUG="-ggdb -Og"
 CXXFLAGS_OPTIM_DEBUG="$CFLAGS_OPTIM_DEBUG"
 LDFLAGS_OPTIM_DEBUG="-ggdb"
 # split debug settings (requires gold)
-CFLAGS_OPTIM_DEBUG_SPLIT="-gsplit-dwarf -Og"
+CFLAGS_OPTIM_DEBUG_SPLIT="-gdwarf-4 -gsplit-dwarf -Og"
 CXXFLAGS_OPTIM_DEBUG_SPLIT="$CFLAGS_OPTIM_DEBUG_SPLIT"
-LDFLAGS_OPTIM_DEBUG_SPLIT="-Wl,--gdb-index"
+LDFLAGS_OPTIM_DEBUG_SPLIT="-gdwarf-4 -Wl,--gdb-index"
 
 # position-independent code
 CFLAGS_OPTIM_PIC="-fPIC -DPIC"