diff --git a/src/libespeak-ng/compiledata.c b/src/libespeak-ng/compiledata.c
index 2dc9c8d3..9d0d6190 100644
--- a/src/libespeak-ng/compiledata.c
+++ b/src/libespeak-ng/compiledata.c
@@ -1410,9 +1410,9 @@ static int LoadEnvelope2(FILE *f)
 		if (env_lin[ix2] > 0) {
 			y = (env_y[ix2] + (env_y[ix2+1] - env_y[ix2]) * ((float)x - env_x[ix2]) / (env_x[ix2+1] - env_x[ix2])) * 2.55;
 		} else if (n_points > 3)
-			y = (int)(polint(&env_x[ix], &env_y[ix], 4, x) * 2.55); // convert to range 0-255
+			y = (int)(polint(&env_x[ix], &env_y[ix], 4, x) * 255 / 100); // convert to range 0-255
 		else
-			y = (int)(polint(&env_x[ix], &env_y[ix], 3, x) * 2.55);
+			y = (int)(polint(&env_x[ix], &env_y[ix], 3, x) * 255 / 100);
 		if (y < 0) y = 0;
 		if (y > 255) y = 255;
 		env[x] = y;
diff --git a/tests/language-phonemes.test b/tests/language-phonemes.test
index 09c300db..36e0eff7 100755
--- a/tests/language-phonemes.test
+++ b/tests/language-phonemes.test
@@ -28,7 +28,7 @@ test_phwav bn 7fc6c8c6b347677885c6e973ff4dc6b2b6fa6d59 "ma na Na pa ta t.a tSa k
 test_phwav bpy 7fc6c8c6b347677885c6e973ff4dc6b2b6fa6d59 "ma na Na pa ta t.a tSa ka p#a t#a t.#a tS#a k#a ba da d.a dZa ga b#a d#a d.#a g#a fa Ba sa za Sa Za ha Ha wa la ja ra *a Ra _:_ ma mE mO me mi mi mu m& mV"
 test_phwav bs f3b9ea69a52d9cabc18007c0bb49c16583acef1b "ma na Na pa ta ka ba da ga tsa tSa tS;a dZa dZ;a fa sa Sa xa va za Za ja la l^a Ra r*a _:_ m@ m@2 ma ma: me me: mo mo: mi mi: mu mu: mA m& mE mU maI"
 test_phwav ca 563b93f7de72fb4832f2908484bad4908680d7da "ma na n^a Na pa ta ka ba da ga tsa tSa dza dZa sa Sa za Za fa Ta xa va Q\"a ja wa la l^a Ra *a _:_ ma ma# me mE mE2 mO mo mi mU mu"
-test_phwav chr fdfe21bde53ac3665c401a5532484fa674c68158 "ma na Na pa ta ka ba da ga fa Ta sa Sa xa ha va Da za Za tSa dZa la ra ja wa t2a t#a d#a z#a r-a z/2a w#a m- n- N- _:_ mI mE ma m0 mV mU mi: mA: mO: mu: m3: mA@ mO@ mo@ mU@ mi@3 mIR mVR mi@ me@ mi m@ m3 me# mI# mI2 meI maI mOI moU maU maa mO2 maI@ maI3 maU@"
+test_phwav chr 19b85a482cd1b35d0d88660ca73e111accb43673 "ma na Na pa ta ka ba da ga fa Ta sa Sa xa ha va Da za Za tSa dZa la ra ja wa t2a t#a d#a z#a r-a z/2a w#a m- n- N- _:_ mI mE ma m0 mV mU mi: mA: mO: mu: m3: mA@ mO@ mo@ mU@ mi@3 mIR mVR mi@ me@ mi m@ m3 me# mI# mI2 meI maI mOI moU maU maa mO2 maI@ maI3 maU@"
 test_phwav cmn 368d0fd8e646e37e402377328df39b1d6e832401 "na Na la ja pa pha fa ta tha ka kha tS;a tS;ha S;a s.a tsa tsha ts.a ts.ha N-a _:_ ma mA mai mAu m@ m@r mE mei mi mi[ mi. miA miAu miE mio miou mo mo- mou mong mu muA mua muai mu@ mei muo my myu my& myE my@ myi _:_ ma11 ma21 ma214 ma22 ma33 ma35 ma44 ma51 ma53 ma55"
 test_phwav cmn-Latn-pinyin 368d0fd8e646e37e402377328df39b1d6e832401 "na Na la ja pa pha fa ta tha ka kha tS;a tS;ha S;a s.a tsa tsha ts.a ts.ha N-a _:_ ma mA mai mAu m@ m@r mE mei mi mi[ mi. miA miAu miE mio miou mo mo- mou mong mu muA mua muai mu@ mei muo my myu my& myE my@ myi _:_ ma11 ma21 ma214 ma22 ma33 ma35 ma44 ma51 ma53 ma55"
 test_phwav cs 73d5bdeebdab81c629d34f76c87930bb6a188c50 "ma na n^a pa ta ca ka ba da Ja ga tsa tSa dza dZa fa sa Sa xa va za Za ha r-a Ra R^a R^/a la ja _:_ mi mi: me me: ma ma: mo mo: mu mu: maU meU moU"