diff --git a/DriverManager/SQLDriverConnect.c b/DriverManager/SQLDriverConnect.c
index bbfc4c8..fd51d3f 100644
--- a/DriverManager/SQLDriverConnect.c
+++ b/DriverManager/SQLDriverConnect.c
@@ -465,6 +465,8 @@ struct con_pair * con_p;
     if ( keyword )
     {
         con_p = malloc( sizeof( *con_p ));
+        if ( !con_p )
+            return NULL;
         con_p -> keyword = keyword;
         con_p -> attribute = value;
         return con_p;
diff --git a/odbcinst/SQLCreateDataSource.c b/odbcinst/SQLCreateDataSource.c
index 9c41bab..58cf63b 100644
--- a/odbcinst/SQLCreateDataSource.c
+++ b/odbcinst/SQLCreateDataSource.c
@@ -40,6 +40,8 @@ char* _multi_string_alloc_and_copy( LPCWSTR in )
     }
 
     chr = malloc( len + 2 );
+    if ( !chr )
+        return NULL;
 
     len = 0;
     while ( in[ len ] != 0 || in[ len + 1 ] != 0 )
@@ -80,6 +82,8 @@ char* _single_string_alloc_and_copy( LPCWSTR in )
     }
 
     chr = malloc( ulen + 1 );
+    if ( !chr )
+        return NULL;
 
     len = 0;
     ulen = 0;
@@ -127,6 +131,8 @@ char* _single_string_alloc_and_copy( LPCWSTR in )
     }
 
     chr = malloc( len + 1 );
+    if ( !chr )
+        return NULL;
 
     len = 0;
     while ( in[ len ] != 0 )
@@ -157,6 +163,8 @@ SQLWCHAR* _multi_string_alloc_and_expand( LPCSTR in )
     }
 
     chr = malloc(sizeof( SQLWCHAR ) * ( len + 2 ));
+    if ( !chr )
+        return NULL;
 
     len = 0;
     while ( in[ len ] != 0 || in[ len + 1 ] != 0 )
@@ -186,6 +194,8 @@ SQLWCHAR* _single_string_alloc_and_expand( LPCSTR in )
     }
 
     chr = malloc( sizeof( SQLWCHAR ) * ( len + 1 ));
+    if ( !chr )
+        return NULL;
 
     len = 0;
     while ( in[ len ] != 0 )