diff --git a/src/zpie.c b/src/zpie.c
index 351c397..d006814 100644
--- a/src/zpie.c
+++ b/src/zpie.c
@@ -490,9 +490,9 @@ void store_proof(proof p)
 
     int size = 0;
 
-    size += mclBnG1_serialize(buff, 32, &p.piA);
-    size += mclBnG2_serialize(buff + size, 64, &p.piB2);
-    size += mclBnG1_serialize(buff + size, 32, &p.piC);
+    size += mclBnG1_serialize(buff, SIZE_G1, &p.piA);
+    size += mclBnG2_serialize(buff + size, SIZE_G2, &p.piB2);
+    size += mclBnG1_serialize(buff + size, SIZE_G1, &p.piC);
 
     fwrite(buff, 1, size, fproof);
     fclose(fproof);
@@ -516,10 +516,10 @@ proof read_proof()
 
     int size = 0;
 
-    fread(buff, 1, 128, fproof);
-    size += mclBnG1_deserialize(&p.piA, buff, 32);
-    size += mclBnG2_deserialize(&p.piB2, buff + size, 64);
-    size += mclBnG1_deserialize(&p.piC, buff + size, 32);
+    fread(buff, 1, SIZE_G1 + SIZE_G2 + SIZE_G1, fproof);
+    size += mclBnG1_deserialize(&p.piA, buff, SIZE_G1);
+    size += mclBnG2_deserialize(&p.piB2, buff + size, SIZE_G2);
+    size += mclBnG1_deserialize(&p.piC, buff + size, SIZE_G1);
 
     fclose(fproof);
 
diff --git a/src/zpie.h b/src/zpie.h
index 9735422..c367fd5 100644
--- a/src/zpie.h
+++ b/src/zpie.h
@@ -3,6 +3,8 @@
 #ifdef BN128
     #define USEDCURVE MCL_BN_SNARK1
     #define BITS 254
+    #define SIZE_G1 32
+    #define SIZE_G2 64
     #define PRIMESTR "21888242871839275222246405745257275088548364400416034343698204186575808495617"
     #define GROUPGEN 5
     #define GGEN "1 1 2"
@@ -13,6 +15,8 @@
 #elif BLS12_381
     #define USEDCURVE MCL_BLS12_381
     #define BITS 255
+    #define SIZE_G1 48
+    #define SIZE_G2 96
     #define PRIMESTR "52435875175126190479447740508185965837690552500527637822603658699938581184513"
     #define GROUPGEN 7
     #define GGEN "1 3685416753713387016781088315183077757961620795782546409894578378688607592378376318836054947676345821548104185464507 1339506544944476473020471379941921221584933875938349620426543736416511423956333506472724655353366534992391756441569"