diff --git a/include/math.h b/include/math.h
index 656f7868d8c1e35fd0bc540dceeb18899c127398..cf9d9fbf5525946064768a869f860b7b555d9481 100644
--- a/include/math.h
+++ b/include/math.h
@@ -403,7 +403,6 @@ long double pow10l(long double);
 
 double      significand(double);
 float       significandf(float);
-long double significandl(long double);
 #endif
 
 #ifdef __cplusplus
diff --git a/src/math/significandl.c b/src/math/significandl.c
deleted file mode 100644
index c1d68cd71f96ca50c43fa52a4d6b4a1d24d42efb..0000000000000000000000000000000000000000
--- a/src/math/significandl.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#define _GNU_SOURCE
-#include <math.h>
-
-long double significandl(long double x)
-{
-	return scalbnl(x, -ilogbl(x));
-}