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-rw-r--r--src/nvim/eval/encode.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/nvim/eval/encode.c b/src/nvim/eval/encode.c
index 650f11a989..ef647b3ee4 100644
--- a/src/nvim/eval/encode.c
+++ b/src/nvim/eval/encode.c
@@ -316,7 +316,7 @@ int encode_read_from_list(ListReaderState *const state, char *const buf,
#define TYPVAL_ENCODE_CONV_FLOAT(tv, flt) \
do { \
const float_T flt_ = (flt); \
- switch (fpclassify((double)flt_)) { \
+ switch (fpclassify(flt_)) { \
case FP_NAN: { \
ga_concat(gap, (char_u *) "str2float('nan')"); \
break; \