diff --git a/glslang/MachineIndependent/SymbolTable.cpp b/glslang/MachineIndependent/SymbolTable.cpp
index 5dc83539..06b5a813 100644
--- a/glslang/MachineIndependent/SymbolTable.cpp
+++ b/glslang/MachineIndependent/SymbolTable.cpp
@@ -122,7 +122,7 @@ void TType::buildMangledName(TString& mangledName) const
             mangledName += "-tx-struct";
 
             char text[16]; // plenty enough space for the small integers.
-            snprintf(text, sizeof(text), "%d-", sampler.getStructReturnIndex());
+            snprintf(text, sizeof(text), "%u-", sampler.getStructReturnIndex());
             mangledName += text;
         } else {
             switch (sampler.getVectorSize()) {
diff --git a/glslang/MachineIndependent/reflection.cpp b/glslang/MachineIndependent/reflection.cpp
index b0936711..28769332 100644
--- a/glslang/MachineIndependent/reflection.cpp
+++ b/glslang/MachineIndependent/reflection.cpp
@@ -1188,7 +1188,7 @@ void TReflection::dump()
 
         for (int dim=0; dim<3; ++dim)
             if (getLocalSize(dim) > 1)
-                printf("Local size %s: %d\n", axis[dim], getLocalSize(dim));
+                printf("Local size %s: %u\n", axis[dim], getLocalSize(dim));
 
         printf("\n");
     }