diff --git a/library/common.h b/library/common.h
index fdb1193..4a6b318 100644
--- a/library/common.h
+++ b/library/common.h
@@ -72,22 +72,22 @@
  */
 #ifndef GET_UINT32_BE
 #define GET_UINT32_BE(n,b,i)                            \
-{                                                       \
+do {                                                    \
     (n) = ( (uint32_t) (b)[(i)    ] << 24 )             \
         | ( (uint32_t) (b)[(i) + 1] << 16 )             \
         | ( (uint32_t) (b)[(i) + 2] <<  8 )             \
         | ( (uint32_t) (b)[(i) + 3]       );            \
-}
+} while( 0 )
 #endif
 
 #ifndef PUT_UINT32_BE
 #define PUT_UINT32_BE(n,b,i)                            \
-{                                                       \
+do {                                                    \
     (b)[(i)    ] = (unsigned char) ( (n) >> 24 );       \
     (b)[(i) + 1] = (unsigned char) ( (n) >> 16 );       \
     (b)[(i) + 2] = (unsigned char) ( (n) >>  8 );       \
     (b)[(i) + 3] = (unsigned char) ( (n)       );       \
-}
+} while( 0 )
 #endif
 
 /*
@@ -95,22 +95,22 @@
  */
 #ifndef GET_UINT32_LE
 #define GET_UINT32_LE(n,b,i)                            \
-{                                                       \
+do {                                                    \
     (n) = ( (uint32_t) (b)[(i)    ]       )             \
         | ( (uint32_t) (b)[(i) + 1] <<  8 )             \
         | ( (uint32_t) (b)[(i) + 2] << 16 )             \
         | ( (uint32_t) (b)[(i) + 3] << 24 );            \
-}
+} while( 0 )
 #endif
 
 #ifndef PUT_UINT32_LE
 #define PUT_UINT32_LE(n,b,i)                                    \
-{                                                               \
+do {                                                            \
     (b)[(i)    ] = (unsigned char) ( ( (n)       ) & 0xFF );    \
     (b)[(i) + 1] = (unsigned char) ( ( (n) >>  8 ) & 0xFF );    \
     (b)[(i) + 2] = (unsigned char) ( ( (n) >> 16 ) & 0xFF );    \
     (b)[(i) + 3] = (unsigned char) ( ( (n) >> 24 ) & 0xFF );    \
-}
+} while( 0 )
 #endif
 
 /**