diff --git a/glslang/MachineIndependent/Initialize.cpp b/glslang/MachineIndependent/Initialize.cpp
index 8ea58ccc..26b84841 100644
--- a/glslang/MachineIndependent/Initialize.cpp
+++ b/glslang/MachineIndependent/Initialize.cpp
@@ -996,25 +996,25 @@ void TBuiltIns::initialize(int version, EProfile profile, const SpvVersion& spvV
             "bvec3 notEqual(u64vec3, u64vec3);"
             "bvec4 notEqual(u64vec4, u64vec4);"
 
-            "int   findLSB(int64_t);"
-            "ivec2 findLSB(i64vec2);"
-            "ivec3 findLSB(i64vec3);"
-            "ivec4 findLSB(i64vec4);"
+            "int64_t findLSB(int64_t);"
+            "i64vec2 findLSB(i64vec2);"
+            "i64vec3 findLSB(i64vec3);"
+            "i64vec4 findLSB(i64vec4);"
 
-            "int   findLSB(uint64_t);"
-            "ivec2 findLSB(u64vec2);"
-            "ivec3 findLSB(u64vec3);"
-            "ivec4 findLSB(u64vec4);"
+            "int64_t findLSB(uint64_t);"
+            "i64vec2 findLSB(u64vec2);"
+            "i64vec3 findLSB(u64vec3);"
+            "i64vec4 findLSB(u64vec4);"
 
-            "int   findMSB(int64_t);"
-            "ivec2 findMSB(i64vec2);"
-            "ivec3 findMSB(i64vec3);"
-            "ivec4 findMSB(i64vec4);"
+            "int64_t findMSB(int64_t);"
+            "i64vec2 findMSB(i64vec2);"
+            "i64vec3 findMSB(i64vec3);"
+            "i64vec4 findMSB(i64vec4);"
 
-            "int   findMSB(uint64_t);"
-            "ivec2 findMSB(u64vec2);"
-            "ivec3 findMSB(u64vec3);"
-            "ivec4 findMSB(u64vec4);"
+            "int64_t findMSB(uint64_t);"
+            "i64vec2 findMSB(u64vec2);"
+            "i64vec3 findMSB(u64vec3);"
+            "i64vec4 findMSB(u64vec4);"
 
             "\n"
         );