diff --git a/src/libopensc/compression.c b/src/libopensc/compression.c
index 35a0b684..0ec4e1d0 100644
--- a/src/libopensc/compression.c
+++ b/src/libopensc/compression.c
@@ -181,7 +181,7 @@ static int sc_decompress_zlib_alloc(u8** out, size_t* outLen, const u8* in, size
 			if(*out)
 				free(*out);
 			*out = NULL;
-			return Z_MEM_ERROR;
+			return SC_ERROR_OUT_OF_MEMORY;
 		}
 		*out = buf;
 		gz.next_out = buf + *outLen;