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-rw-r--r--converter/other/bmptopnm.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/converter/other/bmptopnm.c b/converter/other/bmptopnm.c
index 30b1012f..647ae3c6 100644
--- a/converter/other/bmptopnm.c
+++ b/converter/other/bmptopnm.c
@@ -421,7 +421,7 @@ lsbZeroCount(unsigned int const mask)
    Use GCC built-in when available.
 -----------------------------------------------------------------------------*/
 
-#if ( defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ >= 304) )
+#if HAVE_GCC_BITCOUNT 
 {
       return ( mask==0 ? sizeof(mask)*8 : __builtin_ctz(mask) );
 }