diff --git a/cpu/at32ap/Makefile b/cpu/at32ap/Makefile
index e08f273..60899c7 100644
--- a/cpu/at32ap/Makefile
+++ b/cpu/at32ap/Makefile
@@ -30,7 +30,7 @@
 START-y			+= start.o
 
 COBJS-y			+= cpu.o
-COBJS-y			+= hsdramc.o
+COBJS-$(CONFIG_SYS_HSDRAMC) += hsdramc.o
 COBJS-y			+= exception.o
 COBJS-y			+= cache.o
 COBJS-y			+= interrupts.o
diff --git a/cpu/at32ap/hsdramc.c b/cpu/at32ap/hsdramc.c
index f74121c..b6eae66 100644
--- a/cpu/at32ap/hsdramc.c
+++ b/cpu/at32ap/hsdramc.c
@@ -21,7 +21,6 @@
  */
 #include <common.h>
 
-#ifdef CONFIG_SYS_HSDRAMC
 #include <asm/io.h>
 #include <asm/sdram.h>
 
@@ -116,5 +115,3 @@
 
 	return sdram_size;
 }
-
-#endif /* CONFIG_SYS_HSDRAMC */