diff --git a/tools/qfcc/source/glsl-builtins.c b/tools/qfcc/source/glsl-builtins.c
index 2c357005e..ed5b9611c 100644
--- a/tools/qfcc/source/glsl-builtins.c
+++ b/tools/qfcc/source/glsl-builtins.c
@@ -435,15 +435,15 @@ SRC_LINE
 "genIType clamp(genIType x, int minVal, int maxVal);"               "\n"
 "genUType clamp(genUType x, genUType minVal, genUType maxVal);"     "\n"
 "genUType clamp(genUType x, uint minVal, uint maxVal);"             "\n"
-"genFType mix(genFType x, genFType y, genFType a);"                 "\n"
-"genFType mix(genFType x, genFType y, float a);"                    "\n"
-"genDType mix(genDType x, genDType y, genDType a);"                 "\n"
-"genDType mix(genDType x, genDType y, double a);"                   "\n"
-"genFType mix(genFType x, genFType y, genBType a);"                 "\n"
-"genDType mix(genDType x, genDType y, genBType a);"                 "\n"
-"genIType mix(genIType x, genIType y, genBType a);"                 "\n"
-"genUType mix(genUType x, genUType y, genBType a);"                 "\n"
-"genBType mix(genBType x, genBType y, genBType a);"                 "\n"
+"genFType mix(genFType x, genFType y, genFType a) = " GLSL(46) ";"  "\n"
+"genFType mix(genFType x, genFType y, float a) = " GLSL(46) ";"     "\n"
+"genDType mix(genDType x, genDType y, genDType a) = " GLSL(46) ";"  "\n"
+"genDType mix(genDType x, genDType y, double a) = " GLSL(46) ";"    "\n"
+"genFType mix(genFType x, genFType y, genBType a) = " SPV(169) ";"  "\n"
+"genDType mix(genDType x, genDType y, genBType a) = " SPV(169) ";"  "\n"
+"genIType mix(genIType x, genIType y, genBType a) = " SPV(169) ";"  "\n"
+"genUType mix(genUType x, genUType y, genBType a) = " SPV(169) ";"  "\n"
+"genBType mix(genBType x, genBType y, genBType a) = " SPV(169) ";"  "\n"
 "genFType step(genFType edge, genFType x);"                         "\n"
 "genFType step(float edge, genFType x);"                            "\n"
 "genDType step(genDType edge, genDType x);"                         "\n"