diff --git a/build/config.mak b/build/config.mak
index 3020a8436..19bc22d22 100644
--- a/build/config.mak
+++ b/build/config.mak
@@ -7,7 +7,7 @@ DEBUG ?= 1
 # Do not edit below this
 
 ifeq ($(DEBUG),1)
-OPTIM_SFLAGS ?= -O0
+OPTIM_SFLAGS ?= -O0 -g
 else
 OPTIM_SFLAGS ?= -Os
 endif