diff --git a/internal/c/common.cpp b/internal/c/common.cpp
index 9f4e1baab..3edf5d407 100644
--- a/internal/c/common.cpp
+++ b/internal/c/common.cpp
@@ -235,7 +235,7 @@ inline int64 qbr(long double f){
   int64 i; int temp=0;
   if (f<=-9223372036854775808.5) {error(6); return 0;} // if the float is smaller than what an integer 64 could possible hold, toss an overflow error.
   if (f>=18446744073709551615.5) {error(6); return 0;} // same result if the number is larger than what an integer 64 could possibly hold.
-  if (f>9223372036854775807) {temp=1;f=f-9223372036854775808;} //if it's too large for a signed int64, make it an unsigned int64 and return that value if possible.
+  if (f>9223372036854775807) {temp=1;f=f-9223372036854775808u;} //if it's too large for a signed int64, make it an unsigned int64 and return that value if possible.
   if (f<0) i=f-0.5f; else i=f+0.5f;
   if (temp) return i|0x8000000000000000;//+9223372036854775808;
   return i;
@@ -250,7 +250,7 @@ inline int64 qbr(long double f){
   int64 i; int temp=0;
   if (f<=-9223372036854775808.5) {error(6); return 0;} // if the float is smaller than what an integer 64 could possible hold, toss an overflow error.
   if (f>=18446744073709551615.5) {error(6); return 0;} // same result if the number is larger than what an integer 64 could possibly hold.
-  if (f>9223372036854775807) {temp=1;f=f-9223372036854775808;} //if it's too large for a signed int64, make it an unsigned int64 and return that value if possible.
+  if (f>9223372036854775807) {temp=1;f=f-9223372036854775808u;} //if it's too large for a signed int64, make it an unsigned int64 and return that value if possible.
   __asm{
 	  fld   f
       fistp i
@@ -290,7 +290,7 @@ inline int64 qbr(long double f){
   int64 i; int temp=0;
   if (f<=-9223372036854775808.5) {error(6); return 0;} // if the float is smaller than what an integer 64 could possible hold, toss an overflow error.
   if (f>=18446744073709551615.5) {error(6); return 0;} // same result if the number is larger than what an integer 64 could possibly hold.
-  if (f>9223372036854775807) {temp=1;f=f-9223372036854775808;} //if it's too large for a signed int64, make it an unsigned int64 and return that value if possible.
+  if (f>9223372036854775807) {temp=1;f=f-9223372036854775808u;} //if it's too large for a signed int64, make it an unsigned int64 and return that value if possible.
   __asm__ (
 	   "fldt %1;"
 	   "fistpll %0;"