diff --git a/Makefile.common b/Makefile.common
index d48647db9c5..f3316ba962b 100644
--- a/Makefile.common
+++ b/Makefile.common
@@ -592,7 +592,7 @@ LIB_OPTS_P :=  $(LLVM_LIBS_OPTIONS_P) $(PROJ_LIBS_OPTIONS_P)
 
 # USED_LIB_PATHS - Compute the path of the libraries used so that tools are
 # rebuilt if libraries change.  This has to make sure to handle .a/.so and .o
-# files seperately.
+# files separately.
 #
 STATICUSEDLIBS   := $(patsubst %.a.o, lib%.a, $(addsuffix .o, $(USEDLIBS)))
 USED_LIB_PATHS_G := $(addprefix $(DESTLIBDEBUG)/, $(STATICUSEDLIBS))
diff --git a/Makefile.rules b/Makefile.rules
index d48647db9c5..f3316ba962b 100644
--- a/Makefile.rules
+++ b/Makefile.rules
@@ -592,7 +592,7 @@ LIB_OPTS_P :=  $(LLVM_LIBS_OPTIONS_P) $(PROJ_LIBS_OPTIONS_P)
 
 # USED_LIB_PATHS - Compute the path of the libraries used so that tools are
 # rebuilt if libraries change.  This has to make sure to handle .a/.so and .o
-# files seperately.
+# files separately.
 #
 STATICUSEDLIBS   := $(patsubst %.a.o, lib%.a, $(addsuffix .o, $(USEDLIBS)))
 USED_LIB_PATHS_G := $(addprefix $(DESTLIBDEBUG)/, $(STATICUSEDLIBS))
diff --git a/lib/Analysis/Expressions.cpp b/lib/Analysis/Expressions.cpp
index 9b305bbe409..f1016a50dbe 100644
--- a/lib/Analysis/Expressions.cpp
+++ b/lib/Analysis/Expressions.cpp
@@ -253,7 +253,7 @@ ExprType ClassifyExpression(Value *Expr) {
   Instruction *I = cast<Instruction>(Expr);
   const Type *Ty = I->getType();
 
-  switch (I->getOpcode()) {       // Handle each instruction type seperately
+  switch (I->getOpcode()) {       // Handle each instruction type separately
   case Instruction::Add: {
     ExprType Left (ClassifyExpression(I->getOperand(0)));
     ExprType Right(ClassifyExpression(I->getOperand(1)));