diff --git a/src/sdl/i_system.c b/src/sdl/i_system.c
index 984f6dd22..3610a534d 100644
--- a/src/sdl/i_system.c
+++ b/src/sdl/i_system.c
@@ -2810,6 +2810,12 @@ UINT32 I_GetFreeMem(UINT32 *total)
 	UINT32 totalKBytes;
 	INT32 n;
 	INT32 meminfo_fd = -1;
+	long Cached;
+	long MemFree;
+	long Buffers;
+	long Shmem;
+	long MemAvailable = -1;
+	boolean guessed = false; // Stupid way to verify if the amount was guessed or not.
 
 	meminfo_fd = open(MEMINFO_FILE, O_RDONLY);
 	n = read(meminfo_fd, buf, 1023);