diff --git a/arm9/src/storage.c b/arm9/src/storage.c
index cfe03f5..c8df794 100644
--- a/arm9/src/storage.c
+++ b/arm9/src/storage.c
@@ -512,6 +512,15 @@ unsigned long long getDsiSize()
 	return 1024 * BYTES_PER_BLOCK;
 }
 
+unsigned long long getDsiRealFree()
+{
+	struct statvfs st;
+	if (statvfs(sdnandMode ? "sd:/" : "nand:/", &st) == 0)
+		return st.f_bsize * st.f_bavail;
+
+	return 0;
+}
+
 unsigned long long getDsiFree()
 {
 	u32 blockSize = getDsiClusterSize();
@@ -530,16 +539,9 @@ unsigned long long getDsiFree()
 		size -= appSize;
 	}
 
-	return size;
-}
+	unsigned long long realFree = getDsiRealFree();
 
-unsigned long long getDsiRealFree()
-{
-	struct statvfs st;
-	if (statvfs(sdnandMode ? "sd:/" : "nand:/", &st) == 0)
-		return st.f_bsize * st.f_bavail;
-
-	return 0;
+	return (realFree < size) ? realFree : size;
 }
 
 u32 getDsiClusterSize()
diff --git a/arm9/src/storage.h b/arm9/src/storage.h
index d99a6d3..ace54be 100644
--- a/arm9/src/storage.h
+++ b/arm9/src/storage.h
@@ -41,8 +41,8 @@ unsigned long long getSDCardFree();
 
 //internal storage
 unsigned long long getDsiSize();
-unsigned long long getDsiFree();
 unsigned long long getDsiRealFree();
+unsigned long long getDsiFree();
 u32 getDsiClusterSize();
 #define getDsiUsed() (getDSIStorageSize() - getDSIStorageFree())