diff --git a/legacy/eina/src/lib/eina_fp.c b/legacy/eina/src/lib/eina_fp.c
index 264e972852..1ade0b8318 100644
--- a/legacy/eina/src/lib/eina_fp.c
+++ b/legacy/eina/src/lib/eina_fp.c
@@ -200,7 +200,7 @@ eina_f32p32_sin(Eina_F32p32 a)
 			      EINA_F32P32_PI);
    idx = eina_f32p32_int_to(interpol);
    if (idx >= MAX_PREC)
-     idx = MAX_PREC - (idx + 1);
+     idx = 2 * MAX_PREC - (idx + 1);
 
    index2 = idx + 1;
    if (index2 == MAX_PREC)
diff --git a/legacy/eina/src/tests/Makefile.am b/legacy/eina/src/tests/Makefile.am
index 1b0736fd2e..b94570cf1e 100644
--- a/legacy/eina/src/tests/Makefile.am
+++ b/legacy/eina/src/tests/Makefile.am
@@ -32,6 +32,7 @@ check_PROGRAMS = eina_suite
 
 eina_suite_SOURCES = 	\
 eina_suite.c 		\
+eina_test_fp.c		\
 eina_test_stringshare.c \
 eina_test_array.c 	\
 eina_test_error.c	\
diff --git a/legacy/eina/src/tests/eina_suite.c b/legacy/eina/src/tests/eina_suite.c
index c009771705..8a51db217a 100644
--- a/legacy/eina/src/tests/eina_suite.c
+++ b/legacy/eina/src/tests/eina_suite.c
@@ -33,6 +33,7 @@ struct _Eina_Test_Case
 };
 
 static const Eina_Test_Case etc[] = {
+  { "FixedPoint", eina_test_fp },
   { "Array", eina_test_array },
   { "String Share", eina_test_stringshare },
   { "Log", eina_test_log },