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-rw-r--r--libguile/fluids.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/libguile/fluids.h b/libguile/fluids.h
index cb4fba4bd..0a60bac9e 100644
--- a/libguile/fluids.h
+++ b/libguile/fluids.h
@@ -50,7 +50,7 @@
SCM_API scm_t_bits scm_tc16_fluid;
-#define SCM_FLUIDP(x) (!SCM_IMP (x) && (SCM_CELL_TYPE (x) == scm_tc16_fluid))
+#define SCM_FLUIDP(x) (SCM_SMOB_PREDICATE (scm_tc16_fluid, (x)))
#define SCM_FLUID_NUM(x) (SCM_CELL_WORD_1 (x))
/* The fastest way to acces/modify the value of a fluid. These macros